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427 results on '"Philippe PERNOD"'

1. Contribution of Ribbon-Structured SiO2 Films to AlN-Based and AlN/Diamond-Based Lamb Wave Resonators

Author: Mohammed Moutaouekkil, Jérémy Streque, Othmane Marbouh, El Houssaine El Boudouti, Omar Elmazria, Philippe Pernod, Olivier Bou Matar, and Abdelkrim Talbi
Subjects: S0 Lamb-wave mode, K2, AlN/SiO2 bi-layer, SiO2 ribbons, TCF, Chemical technology, TP1-1185
Abstract: New designs based on S0 Lamb modes in AlN thin layer resonating structures coupled with the implementation of structural elements in SiO2, are theoretically analyzed by the Finite Element Method (FEM). This study compares the typical characteristics of different interdigital transducer (IDTs) configurations, involving either a continuous SiO2 cap layer, or structured SiO2 elements, showing their performance in the usual terms of electromechanical coupling coefficient (K2), phase velocity, and temperature coefficient of frequency (TCF), by varying structural parameters and boundary conditions. This paper shows how to reach temperature-compensated, high-performance resonator structures based on ribbon-structured SiO2 capping. The addition of a thin diamond layer can also improve the velocity and electromechanical coupling coefficient, while keeping zero TCF and increasing the solidity of the membranes. Beyond the increase in performance allowed by such resonator configurations, their inherent structure shows additional benefits in terms of passivation, which makes them particularly relevant for sensing applications in stern environments.
Published: 2023
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2. Polarization control of THz emission using spin-reorientation transition in spintronic heterostructure

Author: Dinar Khusyainov, Sergei Ovcharenko, Mikhail Gaponov, Arseniy Buryakov, Alexey Klimov, Nicolas Tiercelin, Philippe Pernod, Vadim Nozdrin, Elena Mishina, Alexander Sigov, and Vladimir Preobrazhensky
Subjects: Medicine, Science
Abstract: Abstract Polarization of electromagnetic waves plays an extremely important role in interaction of radiation with matter. In particular, interaction of polarized waves with ordered matter strongly depends on orientation and symmetry of vibrations of chemical bonds in crystals. In quantum technologies, the polarization of photons is considered as a “degree of freedom”, which is one of the main parameters that ensure efficient quantum computing. However, even for visible light, polarization control is in most cases separated from light emission. In this paper, we report on a new type of polarization control, implemented directly in a spintronic terahertz emitter. The principle of control, realized by a weak magnetic field at room temperature, is based on a spin-reorientation transition (SRT) in an intermetallic heterostructure TbCo2/FeCo with uniaxial in-plane magnetic anisotropy. SRT is implemented under magnetic field of variable strength but of a fixed direction, orthogonal to the easy magnetization axis. Variation of the magnetic field strength in the angular (canted) phase of the SRT causes magnetization rotation without changing its magnitude. The charge current excited by the spin-to-charge conversion is orthogonal to the magnetization. As a result, THz polarization rotates synchronously with magnetization when magnetic field strength changes. Importantly, the radiation intensity does not change in this case. Control of polarization by SRT is applicable regardless of the spintronic mechanism of the THz emission, provided that the polarization direction is determined by the magnetic moment orientation. The results obtained open the prospect for the development of the SRT approach for THz emission control.
Published: 2021
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3. A Biosensor Based on Bound States in the Continuum and Fano Resonances in a Solid–Liquid–Solid Triple Layer

Author: Ilyasse Quotane, Madiha Amrani, Cecile Ghouila-Houri, El Houssaine El Boudouti, Leonid Krutyansky, Bogdan Piwakowski, Philippe Pernod, Abdelkrim Talbi, and Bahram Djafari-Rouhani
Subjects: bound states in continuum (BIC), fano resonance, phononic crystal, biosensor, Crystallography, QD901-999
Abstract: We propose a simple solid–liquid–solid triple layer biosensor platform based on bound states in the continuum (BICs) and Fano resonances to detect the acoustic properties of liquids and apply the method to a mixture of water and albumin with various concentrations. The solid–liquid–solid triple layer is composed of an epoxy as a solid layer and an albumin–water mixture as a liquid layer, and the entire system is immersed in water. In this work, we show that the structure exhibits a high sensitivity (S), quality factor (Q), and figure of merit (FOM) with a better detection limit (DL) in the vicinity of the BICs where the transmission spectra exhibit Fano resonances. The Fano resonances shift towards high frequencies as the concentration increases. The detection limit can reach very small values for a small albumin concentration (4.7%). In addition, for a given concentration and layer thickness of the sensing material, we show the effect of the incidence angle on the efficiency of the sensor in terms of the sensitivity and quality factor. The proposed structure can be designed from low-cost material and can be used as a sensor to detect different types of liquids and gases as well.
Published: 2022
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4. Tunable Magneto-Optical Kerr Effects of Nanoporous Thin Films

Author: Weiwei Zhang, Jianjun Li, Xiaokun Ding, Philippe Pernod, Nicolas Tiercelin, and Yujun Song
Subjects: Medicine, Science
Abstract: Abstract Magnetoplasmonics, combining magnetic and plasmonic functions, has attracted increasing attention owing to its unique magnetic and optical properties in various nano-architectures. In this work, Ag, CoFeB and ITO layers are fabricated on anodic aluminum oxide (AAO) porous films to form hybrid multi-layered nanoporous thin films by magnetron sputtering deposition process. The designed nanostructure supports localized surface plasmon resonance (LSPR) and tunable magneto-optical (MO) activity, namely, the sign inversion, which can be controlled by AAO porous film geometry (pore diameter and inter-pore spacing) flexibly. The physical mechanism of this special MO phenomena is further analyzed and discussed by the correlation of Kerr rotation and electronic oscillations controlled by the surface plasmon resonance that is related to the nanoporous structure.
Published: 2017
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5. Highly Confined Love Waves Modes by Defects States in a Phononic Crystal Based on Holey-SiO2/ST-Cut Quartz Structure

Author: Yu-Xin Liu, Abdelkrim Talbi, Philippe Pernod, and Olivier Bou Matar
Subjects: phononic crystal, love waves, band gap, defect, General Works
Abstract: We investigate the properties of highly confined Love modes in a phononic crystal based on an array of holes made in SiO2 deposited on ST-cut Quartz substrate. An optimal choice of the geometrical parameters of the holes enables us to obtain wide stop-bands frequency for shear wave’s modes. The introduction of defect by removing lines of holes leads to nearly flat modes within the band gap and consequently paves the way to implement advanced design of electroacoustic filters and high-performance cavity resonators based on shear wave modes. The calculations are performed using finite element method based on the commercial software (COMSOL-Multiphysics). For transmission spectra, piezoelectric excitations are applied by considering the interdigital transducers, with results corroborating well the band structure predictions and the position of defects modes within the band gap.
Published: 2018
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6. Highly Sensitive Surface Acoustic Wave Magnetic Field Sensor Using Multilayered TbCo2/FeCo Thin Film

Author: Aurelien Mazzamurro, Abdelkrim Talbi, Yannick Dusch, Omar Elmazria, Philippe Pernod, Olivier Bou Matar, and Nicolas Tiercelin
Subjects: SAW sensor, magnetostriction, ∆E-effect, multilayered thin film, General Works
Abstract: Over the last decades, the use of Surface Acoustic Waves (SAW) has emerged as a promising technology in many applications such as filters, signal processing but also sensors. We report the fabrication and the characterization of a SAW delay line magnetic field sensor using uniaxial multi-layered 14×[TbCo2(3.7nm)/FeCo(4nm)] nanostructured thin film deposited on Y36° Lithium Niobate (Figure 1a). The sensor shows an interesting dependency to a tunable bias magnetic field with different orientations relative to the easy axis. The obtained results are well explained using an equivalent piezo-magnetic model described in a previous work.
Published: 2018
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7. Robust Calorimetric Micro-Sensor for Aerodynamic Applications

Author: Cécile Ghouila-Houri, Célestin Ott, Romain Viard, Quentin Gallas, Eric Garnier, Abdelkrim Talbi, and Philippe Pernod
Subjects: MEMS sensor, thermal sensor, calorimetric sensor, wall shear stress sensor, active flow control, General Works
Abstract: This paper reports a calorimetric micro-sensor designed for aerodynamic applications. Measuring both the amplitude and the sign of the wall shear stress at small length-scale and high frequencies, the micro-sensor is particularly suited for flow separation detection and flow control. The micro-sensor was calibrated in static and dynamic in a turbulent boundary layer wind tunnel. Several micro-sensors were embedded in various configurations for measuring the shear stress and detecting flow separation. Specially, one was embedded inside an actuator slot for in situ measurements and twelve, associated with miniaturized electronics, were implemented on a flap model for active flow control experiments.
Published: 2018
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8. Nanogap Pirani Sensor Operating in Constant Temperature Mode for Near Atmospheric Pressure Measurements

Author: Cécile Ghouila-Houri, Ralph Sindjui, Mohammed Moutaouekkil, Omar Elmazria, Quentin Gallas, Eric Garnier, Alain Merlen, Romain Viard, Abdelkrim Talbi, and Philippe Pernod
Subjects: MEMS sensors, pressure sensors, pirani sensors, flow control, General Works
Abstract: This paper presents a high sensitive micro-sensor designed for pressure measurements in a wide range around atmospheric pressure, for application in aerodynamics. The sensor is a temperature-resistance transducer operating with the Pirani effect, which states that below a certain pressure limit, the thermal conductivity of a gas is pressure-dependent. The sensor presents a wide measurement range between 10 kPa and about 800 kPa, in both constant current and constant temperature mode. The last mode enables high-sensitive measurements with a maximum of sensitivity around atmospheric pressure, enabling the use of the sensor for applications in aerodynamics and fluid dynamics, such as active flow control.
Published: 2017
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9. Wall Shear Stress Calorimetric Micro-Sensor Designed for Flow Separation Detection and Active Flow Control

Author: Cécile Ghouila-Houri, Quentin Gallas, Eric Garnier, Alain Merlen, Romain Viard, Abdelkrim Talbi, and Philippe Pernod
Subjects: MEMS sensors, wall shear stress sensors, calorimetric sensors, flow control, separation detection, General Works
Abstract: This paper presents an efficient and high-sensitive micro-sensor designed for wall shear stress measurement. The main technical application targeted is flow separation detection for closed-loop active flow control. The sensor is a temperature-resistance transducer operating on heat transfer. The device is micro-structured with three substrate-free wires presenting a high aspect ratio, and periodic perpendicular micro-bridges ensuring mechanical toughness and thermal insulation. This design achieves a homogeneous temperature distribution along the wires. Welded on a flexible printed circuit, the sensor is wall-mounted on a wind tunnel. The experiments, conducted in both attached and separated flow configurations, demonstrate the sensor sensitivity to wall shear stress up to 2.4 Pa and the ability of the 3-wires based design to perform flow direction sensing for back-flow detection.
Published: 2017
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10. Flight-Testing of a MEMS Wall Shear Stress Thermal Sensor on a Microlight Aircraft.

Author: Cecile Ghouila-Houri, Thomas Arnoult, Aurélien Mazzamurro, Sylvain Kern, Romain Viard, Damien Teillet, Emma Palfi, Eric Garnier, Abdelkrim Talbi, and Philippe Pernod
Published: 2023
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11. Cavity flow controlled with an array of magneto-mechanical micro-valves.

Author: Thomas Arnoult, Cecile Ghouila-Houri, Colin Leclercq, Aurélien Mazzamurro, Romain Viard, Eric Garnier, Denis Sipp, Alain Merlen, Abdelkrim Talbi, and Philippe Pernod
Published: 2021
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12. Aerodynamic wall pressure measurement using a high temperature gradient Pirani micro-sensor.

Author: Cecile Ghouila-Houri, Munique Kazar-Mendes, Thomas Arnoult, Romain Viard, Quentin Gallas, Eric Garnier, Alain Merlen, Abdelkrim Talbi, and Philippe Pernod
Published: 2020
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13. Hybridization of Love surface acoustic waves in SiO2/ST-Quartz structure with resonant pillars grafted on the meta-surface.

Author: Yuxin Liu, Abdelkrim Talbi, Cecile Ghouila-Houri, El Houssaine El Boudouti, Olivier Bou Matar, Philippe Pernod, and Bahram Djafari-Rouhani
Published: 2020
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14. Time domain reflectometry for improved Surface Acoustic Wave magnetic field sensor sensitivity.

Author: Aurélien Mazzamurro, Abdelkrim Talbi, Yannick Dusch, Cécile Ghouila-Houri, Philippe Pernod, Olivier Bou Matar, and Nicolas Tiercelin
Published: 2019
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15. MEMS high temperature gradient sensor for skin-friction measurements in highly turbulent flows.

Author: Cecile Ghouila-Houri, Abdelkrim Talbi, Romain Viard, Quentin Gallas, Eric Garnier, Pascal Molton, Jérôme Delva, Alain Merlen, and Philippe Pernod
Published: 2019
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16. Robust thermal microstructure for designing flow sensors and pressure sensors.

Author: Cecile Ghouila-Houri, Romain Viard, Quentin Gallas, Eric Garnier, Alain Merlen, Abdelkrim Talbi, and Philippe Pernod
Published: 2017
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17. Contribution of Ribbon-Structured SiO2 Films to AlN-Based and AlN/Diamond-Based Lamb Wave Resonators

Author: Talbi, Mohammed Moutaouekkil, Jérémy Streque, Othmane Marbouh, El Houssaine El Boudouti, Omar Elmazria, Philippe Pernod, Olivier Bou Matar, and Abdelkrim
Subjects: S0 Lamb-wave mode, K2, AlN/SiO2 bi-layer, SiO2 ribbons, TCF
Abstract: New designs based on S0 Lamb modes in AlN thin layer resonating structures coupled with the implementation of structural elements in SiO2, are theoretically analyzed by the Finite Element Method (FEM). This study compares the typical characteristics of different interdigital transducer (IDTs) configurations, involving either a continuous SiO2 cap layer, or structured SiO2 elements, showing their performance in the usual terms of electromechanical coupling coefficient (K2), phase velocity, and temperature coefficient of frequency (TCF), by varying structural parameters and boundary conditions. This paper shows how to reach temperature-compensated, high-performance resonator structures based on ribbon-structured SiO2 capping. The addition of a thin diamond layer can also improve the velocity and electromechanical coupling coefficient, while keeping zero TCF and increasing the solidity of the membranes. Beyond the increase in performance allowed by such resonator configurations, their inherent structure shows additional benefits in terms of passivation, which makes them particularly relevant for sensing applications in stern environments.
Published: 2023
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18. Control Strategies and Performance of a Magnetically Actuated Tactile Micro-actuator Array.

Author: Jérémy Streque, Abdelkrim Talbi, Philippe Pernod, and Vladimir Preobrazhensky
Published: 2010
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19. Electromagnetic Actuation Based on MEMS Technology for Tactile Display.

Author: Jérémy Streque, Abdelkrim Talbi, Philippe Pernod, and Vladimir Preobrazhensky
Published: 2008
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20. A New Approach to Improve the Control of the Sensitive Layer of Surface Acoustic Wave Gas Sensors Using the Electropolymerization

Author: Zakariae Oumekloul, Sebastien Pecqueur, Arnaud de Maistre, Philippe Pernod, Kamal Lmimouni, Abdelkrim Talbi, Bilel Hafsi, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Transduction, Propagation et Imagerie Acoustique - IEMN (TPIA - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Nanostructures, nanoComponents & Molecules - IEMN (NCM - IEMN), Institut Catholique d'Arts et Métiers (ICAM), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), and The authors thank the support of an internal project ‘IOT Make Sense’
Subjects: Surface Acoustic Wave (SAW), [SPI]Engineering Sciences [physics], Radio Frequency (RF), Electropolymerization, Organic Electrochemical Sensors
Abstract: International audience; Surface acoustic waves (SAWs) have a broad spectrum of applications, especially in sensing. However, deposition methods of sensitive layers can be controlled locally through electrodeposition unlike other conventional methods, such as drop-casting and atmospheric-pressure plasma. Employing this method, we experimentally demonstrate the local electrodeposition of PEDOT: PSS on a structured active gold surface. We investigate the response of a piezoelectric transducer at 215MHz, by exploiting shear-horizontal (SH) surface waves of the ST-cut quartz substrate. The sensor responses were then tested under acetone, methanol, isopropanol and water vapor gases. Phase changes were more observed under water vapors gases. These changes depended on the surface conductivity of PEDOT: PSS deposited on the sensor. The double-port SAW gas sensors modified with the PEDOT: PSS presented the highest sensitivity in the case of water vapor, with a maximum phase shift of 0.8° and an insertion loss of about 0.5 dB at room temperature. The obtained results could pave the way to implement advanced designs of high-performance and wireless electroacoustic gas sensors based on electropolymerization.
Published: 2022
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21. High temperature gradient Pirani micro-sensor designed and tested for aerodynamic wall pressure measurement

Author: Cécile Ghouila-Houri, Q. Gallas, M. Kazar-Mendes, Romain Viard, T. Arnoult, A. Merlen, Philippe Pernod, A. Mazzamurro, Eric Garnier, Abdelkrim Talbi, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Fluiditech (Thurmelec), ISEN Yncréa Ouest, Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 (LMFL), Centrale Lille-ONERA-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), DAAA, ONERA, Université Paris Saclay [Meudon], ONERA-Université Paris-Saclay, This work is funded by the French National Research Agency (ANR) in the framework of the ANR ASTRID 'CAMELOTT' project, grant number ANR-14-ASTR-0023-01. It is supported by the regional platform CONTRAERO in the framework of the CPER ELSAT 2020 project. The authors also thank RENATECH, the French national nanofabrication network, and FEDER., Renatech Network, ANR-14-ASTR-0023,CAMELOTT,Capteurs et Actionneurs MEMS pour Le ConTrôle réactif de décollement sur voleT(2014), and European Project
Subjects: Materials science, Aerodynamic wall pressure micro-sensor, Mechanics, Aerodynamics, Pirani sensor, law.invention, Boundary layer, Temperature gradient, MEMS, [SPI]Engineering Sciences [physics], Pressure measurement, Flow velocity, law, Thermal, Perpendicular, pressure sensor, Electrical and Electronic Engineering, Instrumentation, Wind tunnel
Abstract: An earlier version of this paper was presented at the IEEE Sensors 2020 conference and was published in its Proceedings with the title “Aerodynamic wall pressure measurement using a high temperature gradient Pirani micro-sensor” (DOI: 10.1109/SENSORS47125.2020.9278842); International audience; This paper presents and discusses the first demonstration of aerodynamic wall pressure measurement using a thermal Pirani effect based micro-sensor. The thermal micro-sensor is designed as a suspended micro-hot-wire separated from the substrate by a nanoscale gap, and mechanically supported by perpendicular micro-bridges. The micro-sensor was calibrated for pressure measurement from 10 kPa to 800 kPa. It was then used as aerodynamic wall pressure sensor in a turbulent boundary layer wind tunnel and successfully measured the 1.1 kPa depression occurring in the wind tunnel when the flow velocity goes up to 40 m/s.
Published: 2022
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22. Ultrafast manipulation of magnetic anisotropy in a uniaxial intermetallic heterostructure TbCo 2 /FeCo

Author: Sergei Ovcharenko, Mikhail Gaponov, Alexey Klimov, Nicolas Tiercelin, Philippe Pernod, Elena Mishina, Alexander Sigov, Vladimir Preobrazhensky, Russian Technological University (MIREA), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), A. M. Prokhorov General Physics Institute (GPI), Russian Academy of Sciences [Moscow] (RAS), This work was supported by Russian Science Foundation (Grant No. 20-12-00276). Fabrication of the samples was supported by French RENATECH network. The research was done using equipment of the Joint Core Facilities Center RTU MIREA., and Renatech Network
Subjects: spintronics, magnetic anisotropy, Landau–Lifschitz–Gilbert equation, [SPI]Engineering Sciences [physics], Acoustics and Ultrasonics, pump-probe, Condensed Matter Physics, ultrafast magnetization dynamics, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract: We study experimentally and theoretically the dynamics of spin relaxation motion excited by a femtosecond pulse in the TbCo2/FeCo multilayer structures with different ratios of TbCo2 to FeCo thicknesses r d = d T b C o 2 / d F e C o . The main attribute of the structure is in-plane magnetic anisotropy that is artificially induced during sputtering under a DC magnetic field. The optical pump-probe method revealed strongly damped high-frequency oscillations of the dynamical Kerr rotation angle, followed by its slow relaxation to the initial state. Modeling experimental results using the Landau–Lifshitz-Gilbert (LLG) equation showed that the observed entire dynamics is due to destruction and restoration of magnetic anisotropy rather than to demagnetization. For the pumping fluence of 7 mJ cm−2, the maximal photo-induced disruption of the anisotropy field is about 14% for the sample with r d = 1 and decreases when r d increases. The anisotropy relaxation is a three-stage process: the ultrafast one occurs within several picoseconds, and the slow one occurs on a nanosecond time scale. The Gilbert damping in the multilayers is found to be one order of magnitude higher than that in the constituent monolayers.
Published: 2022
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23. Experimental characterization of three-dimensional Graphene’s thermoacoustic response and its theoretical modelling

Author: R. Lardat, Philippe Pernod, Edwin Hang Tong Teo, Dunlin Tan, Philippe Coquet, Olivier Bou-Matar, Zhi Lin Ngoh, Stefano Giordano, Pierre Guiraud, CNRS International - NTU - Thales Research Alliance (CINTRA), THALES [France]-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Thales Underwater Systems (TUS), THALES [France], This study is supported in part by the Economic Development Board of Singapore under the Industrial Postgraduate Program (EDB-IPP) with Thales Solutions Asia Pte Ltd and Temasek Laboratories@Nanyang Technological University seed funding. It is also supported by the French DGA (Direction Générale de l'Armement) under the Conventions Industrielles de Formation par la REcherche Program (CIFRE) with Thales Underwater Systems. This study is developed in collaboration with CINTRA, UMI 3288 CNRS/NTU/THALES (Singapore)., CNRS International NTU THALES Research Alliance (UMI CINTRA), THALES-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), THALES, School of Electrical and Electronic Engineering, Thales Solutions Asia Pte Ltd, Thales Underwater Systems, and Temasek Laboratories
Subjects: Materials science, theoretical modelling, Scanning electron microscope, thermoacoustics, chemistry.chemical_element, loudspeaker, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, chemical vapor deposition, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, symbols.namesake, law, General Materials Science, three-dimensional graphene (3D-C), [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Graphene, business.industry, Thermoacoustics, Three-dimensional Graphene, General Chemistry, 021001 nanoscience & nanotechnology, Compression (physics), Microstructure, 0104 chemical sciences, Characterization (materials science), chemistry, symbols, Optoelectronics, Electrical and electronic engineering::Nanoelectronics [Engineering], 0210 nano-technology, Raman spectroscopy, business, Carbon
Abstract: In the past decade, a lot of research has been conducted on the potential of carbon nanostructured materials to emit sound via thermoacoustics through both simulations and experiments. However, experimental validation of simulations for three-dimensional graphene (3D-C), which has a complicated 3D structure, has yet to be achieved. In this paper, 3D-C is synthesized via thermal chemical vapor deposition and its microstructure and quality tested using Scanning Electron Microscopy and Raman spectroscopy respectively. Then, a two temperature model is used to predict the effects of numerous parameters: frequency, input power, sample size, connection area, connection path, pores per inch, thickness, compression as well as the addition of a backing on the acoustic performance and temperature of the sample. The experimental results presented in this paper validate the predictions of the adopted two temperature model. The efficiency of 3D-C is then compared with results presented in other studies to understand how the presented 3D-C fared against ones from the literature as well as other carbon nanostructured materials. Accepted version This study is supported in part by the Economic Development Board of Singapore under the Industrial Postgraduate Program (EDB-IPP) with Thales Solutions Asia Pte Ltd and Temasek Laboratories@Nanyang Technological University seed funding. It is also supported by the French DGA (Direction Générale de l'Armement) under the Conventions Industrielles de Formation par la REcherche Program (CIFRE) with Thales Underwater Systems. This study is developed in collaboration with CINTRA, UMI 3288 CNRS/NTU/THALES (Singapore).
Published: 2020
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24. Photoinduced spin dynamics in a uniaxial intermetallic heterostructure $$\hbox {TbCo}_2/\hbox {FeCo}$$ TbCo 2 / FeCo

Author: Sergei Ovcharenko, Mikhail Gaponov, Alexey Klimov, Nicolas Tiercelin, Philippe Pernod, Elena Mishina, Alexandr Sigov, and Vladimir Preobrazhensky
Subjects: lcsh:R, lcsh:Medicine, lcsh:Q, lcsh:Science
Abstract: Intermetallic heterostructures of rare-earth and transition metals exhibit physical properties prospective for various applications. These structures combine giant magnetostriction, controllable magnetic anisotropy, magneto-optical activity and allow spin reorientation transitions (SRT) induced by magnetic field at room temperature. Here, we present the results of a study of spin dynamics induced by ultrafast optical excitation in the $$\hbox {TbCo}_2\hbox {/FeCo}$$ TbCo 2 /FeCo heterostructure. The time dependence of the light polarization rotation excited by a pump optical pulse with a duration of 35 fs was measured in the total range of the SRT created by external DC magnetic field. We found hysteretic dependence of the polarization rotation on magnetizing field that is specific for spin dynamics near SRT. Enhancement of the rotation is observed in the critical points of the SRT and near the points of magnetization switch from metastable to stable spin states. In the time-domain, two characteristic delays of 20 ps and 200 ps were found, corresponding to the maximum deviation of the light polarization after excitation. The first is explained by the precession motion of spins out of the plane of the structure. The latter is accounted for the spin in-plane deviation from its initial position and thermal relaxation of the anisotropy.
Published: 2020
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25. Wind tunnel integration of Micro-Magneto-Mechanical Systems (MMMS) microvalves for flow control experiments

Author: Philippe Pernod, Denis Sipp, Eric Garnier, T. Arnoult, Cécile Ghouila-Houri, Abdelkrim Talbi, Colin Leclercq, Romain Viard, M. Benedito, A. Mazzamurro, Q. Gallas, DAAA, ONERA, Université Paris Saclay [Meudon], ONERA-Université Paris-Saclay, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), JMH Conception F- 68100 Mulhouse, France, Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 (LMFL), Centrale Lille-ONERA-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), This work was funded by the French National Research Agency (ANR) in the framework of the ANR ASTRID MATURATION 'CAMELOTT-MATVAL' Project. It is supported by the regional platform CONTRAERO in the framework of the CPER ELSAT 2020 Project. The Innovation Defense Agency (AID) has also financially sustained this work. The authors also thank RENATECH, the French national nanofabrication network, and FEDER., Renatech Network, ANR-18-ASMA-0008,CAMELOTT-MATVAL,Maturation & Valorisation de Capteurs et Actionneurs MEMS pour Le cOnTrôle réacTif d'écoulements(2018), and European Project
Subjects: Flow control (data), quasi-steady jets, Materials science, Mechanical engineering, cavity, flow control, pulsed jets, Physics::Fluid Dynamics, Momentum, Mechanical system, [SPI]Engineering Sciences [physics], Flow (mathematics), Control system, Micro-Magneto-Mechanical Systems (MMMS), Actuator, Magneto, Computer Science::Databases, Wind tunnel
Abstract: International audience; Flow control techniques can be defined as methods changing a flow natural dynamics. The control of a flow can be achieved with actuators affecting the flow momentum. Therefore, a MMMS microvalve was designed and characterized. The micro-actuators have then been integrated to a wind tunnel on the upstream corner of a cavity. Open-loop flow control experiments have been performed.
Published: 2021
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26. Temperature Sensitivity of Surface Phononic Crystals modes (SPnC) based on Ni Pillars array deposited on LiNBO3

Author: Olivier Bou-Matar, Abdelkrim Talbi, Aurelien Mazzamurro, Philippe Pernod, Cecile Ghouila Houri, Ghizlaine Boussatour, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), This work was funded by the regional platform CONTRAERO in the framework of the CPER ELSAT 2020 Project. The authors also thank RENATECH, the French national nanofabrication network, and FEDER, Renatech Network, and European Project
Subjects: Work (thermodynamics), Materials science, Acoustic wave, Condensed matter physics, SAW, Lithium niobate, Surface acoustic wave, Resonance, Bandgap, Substrate (electronics), TCF, Brillouin zone, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], chemistry, Phononic Crystals, Local resonance, Surface Phononic crystal, Temperature coefficient
Abstract: International audience; This work focuses on the theoretical and experimental investigation of acoustic waves sensors based on 2D Surface Phononic Crystals (PnC). We investigated the temperature coefficient of frequency (TCF) for surface localized modes in 2D PnCs composed of Ni pillars deposited on Y-cut LiNBO3 substrate. We demonstrated both theoretically and experimentally that near the first limit of the Brillouin zone, the surface acoustic wave's temperature sensitivity depends considerably on pillars stiffness temperature constants, theirs resonance modes and lattice symmetry of the PnC.
Published: 2021
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27. High temperature gradient micro-sensors for skin-friction measurement in flow control applications

Author: Abdelkrim Talbi, A. Mazzamurro, Eric Garnier, Romain Viard, Cécile Ghouila-Houri, T. Arnoult, A. Merlen, Philippe Pernod, Q. Gallas, M. Benedito, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), DAAA, ONERA [Lille], ONERA, JMH Conception F- 68100 Mulhouse, France, Université de Lille, ONERA, Université de Toulouse [Mauzac], ONERA-PRES Université de Toulouse, Agence Nationale de la Recherche, ANR, This work was funded by the French National ResearchAgency (ANR) in the framework of the ANR ASTRID'CAMELOTT' and the ANR ASTRID MATURATION'CAMELOTT-MATVAL' projects. It is also supported bythe regional platform CONTRAERO in the framework of theCPER ELSAT 2020 Project. The Innovation Defense Agency(AID) has also financially sustained this work. The authorsalso thank RENATECH, the French national nanofabricationnetwork, and FEDER., Renatech Network, ANR-18-ASMA-0008,CAMELOTT-MATVAL,Maturation & Valorisation de Capteurs et Actionneurs MEMS pour Le cOnTrôle réacTif d'écoulements(2018), ANR-14-ASTR-0023,CAMELOTT,Capteurs et Actionneurs MEMS pour Le ConTrôle réactif de décollement sur voleT(2014), and European Project
Subjects: Flow control (data), Jet (fluid), Work (thermodynamics), Materials science, Calorimetric sensors, Acoustics, Temperature measurement, Temperature gradient, Flow separation, Flow control, [SPI]Engineering Sciences [physics], Transducer, Thermal, Wind tunnel experiments, MEMS sensors, Thermal sensors
Abstract: International audience; Robust micro machined high temperature gradient calorimetric (HTGC) transducers were designed and developed for flow separation control. Based on thermal principle, the transducers measure the amplitude and the sign of skin friction, making them particularly useful for flow separation detection. A set of 12 calorimetric micro-sensors along with miniaturized electronics was implemented on a flap model also equipped with pulsed jets. Flow control experiments were successfully conducted as the natural separation occurring on the model was detected by the micro sensors network and controlled by pulsed jet actuation. Ongoing work concerns the realization of closed-loop flow control experiments using the micro-sensors for feedback. © 2021 IEEE.
Published: 2021
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28. Design of a solid-fluid acoustic sensor based on Fano resonances

Author: Abdelkrim Talbi, E. H. El Boudouti, Bahram Djafari-Rouhani, M. Amrani, Bogdan Piwakowski, L. Krutyanskiy, Philippe Pernod, Cécile Ghouila-Houri, Ilyasse Quotane, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Transduction, Propagation et Imagerie Acoustique - IEMN (TPIA - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Physique - IEMN (PHYSIQUE - IEMN), no information, Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN)
Subjects: [PHYS]Physics [physics], Work (thermodynamics), Materials science, Physics::Medical Physics, Continuum (design consultancy), Acoustic sensor, Fano resonance, solid-liquid, biosensor, Molecular physics, Bound state, phononic crystal, Acoustic metamaterials, Detection performance, bound state in the continuum (BICs), Biosensor
Abstract: International audience; The achievement of an efficient acoustic biosensor based on one dimensional solid-liquid phononic crystals supporting bound states in the continuum (BICs) and Fano resonances is reported herein. The structure used in this work is made of solid-liquid-solid triple layer embedded in water. The main results in this paper consist to study the impact of: i) the effect of albumin concentration, ii) the effect of the albumin layer thickness and iii) the influence of the incidence angle θ on albumin detection performance.
Published: 2021
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29. Numerical simulation of the interaction of wave phase conjugation with bubble clouds

Author: Evgeny Timofeev, Amir Modarreszadeh, Philippe Pernod, Alain Merlen, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: Fluid Flow and Transfer Processes, Physics, Bubble, Computer simulation, High-order 2D/axisymmetric, Mechanical Engineering, General Physics and Astronomy, Natural frequency, Mechanics, Acoustic wave, Amplification factor, 01 natural sciences, 010305 fluids & plasmas, Vibration, Physics::Fluid Dynamics, [SPI]Engineering Sciences [physics], Discontinuous Galerkin method, 0103 physical sciences, Nodal Discontinuous Galerkin (NDG), Phase conjugation, 010301 acoustics, Wave Phase Conjugation (WPC)
Abstract: International audience; The interaction of the Wave Phase Conjugation (WPC) process with bubble cloud dynamics is investigated via numerical modeling in application to bubble size measurements. The WPC simulator by Modarreszadeh and Timofeev (Computers and Fluids 197, 104353) is used as a starting point. In the simulator, a modified version of the high-order Nodal Discontinuous Galerkin method is used for modeling of acoustic wave propagation in the active WPC conjugator and the surrounding linear or non-linear fluid in 2D/axisymmetric domains. The effects of bubble dynamics are incorporated with the help of induced volume fractions. The modified Keller–Miksis model is employed to simulate vibrations of bubbles subjected to acoustic waves. After thorough verification and validation of the numerical scheme and the physical model, the interaction of various bubble clouds, including poly-disperse ones, with the WPC process is examined with the help of some existing and newly suggested descriptive indicators, e.g., the amplification factor and the absolute and relative signal intensities. The results show that signals scattered from bubble-plane clouds, in which the bubbles are non-physically synced, are strong enough to affect the modulation process if the stimulation frequency is close to the natural frequency of bubbles. For more realistic bubble clouds, the modulation process is almost intact. However, conjugate waves do carry some signatures of bubble-cloud dynamics, e.g., signals with frequencies higher than the natural frequency of bubbles are significantly diminished. The study demonstrates that WPC-based techniques have a promising potential to be used for measuring bubble dimensions.
Published: 2021
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30. Setting up an IoT lecture for centrale lille: a LoRa (WAN)TM-based labwork, from data transmission to data visualization

Author: Anthony Trioux, Philippe PERNOD, Olivier Boumatar, Yannick Dusch, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), COMmunications NUMériques - IEMN (COMNUM - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Centrale Lille, Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and Centrale Lille Institut (CLIL)
Subjects: [SPI]Engineering Sciences [physics], [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], [INFO]Computer Science [cs], [SPI.SIGNAL]Engineering Sciences [physics]/Signal and Image processing, ComputingMilieux_MISCELLANEOUS, [INFO.INFO-AI]Computer Science [cs]/Artificial Intelligence [cs.AI], [SPI.TRON]Engineering Sciences [physics]/Electronics
Abstract: National audience
Published: 2021

31. Optimization of PCM based thermal management device for power electronics using an effective thermal conductivity model for architected enhancers

Author: Thomas Merlet, Edwin Hang Tong Teo, Dunlin Tan, Jerome Foncin, Hongling Li, Romain Hubert, Philippe Pernod, Philippe Coquet, Jong Jen Yu, Olivier Bou-Matar, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), CNRS International NTU THALES Research Alliance (UMI CINTRA), THALES-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), CINTRA / SEEE Nanyang Technological University, Nanyang Technological University [Singapour], Thales Air Systems, Thales Group [France], Université catholique de Lille (UCL)-Université catholique de Lille (UCL), THALES [France], Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), CNRS International - NTU - Thales Research Alliance (CINTRA), THALES [France]-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), and The authors would like to thank Djamila BAHLOUL-HOURLIER (IEMN, CNRS) for her help in the Differential Scanning Calorimetry measurements.
Subjects: melting, Materials science, Enthalpy of fusion, thermal energy storage, Enclosure, latent heat, Conductivity, Thermal energy storage, 7. Clean energy, Phase-change material, [SPI]Engineering Sciences [physics], Thermal conductivity, phase change materials, thermal management (packaging), Latent heat, Power electronics, thermal conductivity, Composite material
Abstract: International audience; Phase Change Material (PCM) have been widely used for thermal energy storage due to their high latent heat of fusion. Several types of PCM are available and can be selected to meet the required melting temperature and latent heat value. However their low thermal conductivity drastically reduces their performances. Without thermal conductivity enhancement, melting would mainly occur at the interface between the heated surface and the PCM, and would slowly spread in the bulk of the PCM. In that sens the use of fillers is necessary. We present here a study on the use of metallic lattice structure as PCM enhancers. In this paper we illustrate the use of a Effective Thermal Conductivity (ETC) model for four different lattice structures to optimize a PCM based device for the thermal management of power electronics. The optimization is done in terms of device overall dimensions (especially its height) but also in term of composite (or enhanced PCM) enclosure. Actually the composite needs to be enclosed to avoid leaking but the enclosure also serves a heat spreading role which is studied here.
Published: 2021
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32. Instability of a Low-Frequency Gravity—Capillary Wave under Stationary Ultrasonic Irradiation

Author: Philippe Pernod, Vladimir Preobrazhensky, L. M. Krutyansky, Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Prokhorov General Physics Institute of the Russian Academy of Sciences, Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)
Subjects: Capillary wave, Materials science, Physics and Astronomy (miscellaneous), Low frequency, 01 natural sciences, Instability, 010305 fluids & plasmas, Intensity (physics), [SPI]Engineering Sciences [physics], Amplitude, Energy cascade, 0103 physical sciences, Relaxation (physics), Irradiation, Atomic physics, 010306 general physics
Abstract: International audience; A new type of instability of standing gravity—capillary waves has been detected under the irradiation of the liquid surface by a continuous plane ultrasonic beam with a constant amplitude. At an intensity of 1.03-MHz ultrasound above a certain threshold, the excitation of one of the eigenmodes of gravity—capillary waves at a frequency of 6.56 Hz has been observed. The time of establishment of the stationary amplitude of oscillations of the surface significantly exceeds the intrinsic time of relaxation of the mode and decreases with an increase in the threshold excess. The scenario of development of instability is similar to an inverse energy cascade.
Published: 2019
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33. Multilayer modeling of thermoacoustic sound generation for thermophone analysis and design

Author: Stefano Giordano, Pierre Guiraud, Olivier Bou-Matar, Philippe Pernod, R. Lardat, Centro de Investigación y Modelamiento de Fenómenos Aleatorios – Valparaíso (CIMFAV), Universidad de Valparaiso [Chile], Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Temex, Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), and AcknowledgmentThis work was supported by the French DGA/MRIS (Direction Générale de l’Armement/Mission pour la Recherche etl’Innovation Scientifique) and is part of a project developed in collaboration with CINTRA, UMI 3288 CNRS/NTU/THALES(Singapore).
Subjects: Acoustics and Ultrasonics, Plane wave, 02 engineering and technology, 01 natural sciences, Sound generation, 0203 mechanical engineering, Position (vector), 0103 physical sciences, Particle velocity, 010301 acoustics, Nanomaterials, Physics, Coupling, Conservation law, Mechanical Engineering, Closed system, Thermoacoustics, [PHYS.MECA]Physics [physics]/Mechanics [physics], Mechanics, Thermophone, Condensed Matter Physics, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], 020303 mechanical engineering & transports, Heat flux, Mechanics of Materials
Abstract: International audience; A general model for thermoacoustic sound generation, based on the classical conservation laws of mass, momentum and energy, is presented and adopted to analyze different thermophone structures. This model is able to describe an arbitrary multilayered (or laminated) system composed of both solid and fluid layers. In each layer, we consider the propagation of thermal and acoustic plane waves with a full thermo-visco-elastic coupling and with both thermal and viscous dissipations. In order to obtain a flexible model, useful for most of thermophone systems, the balance equations are written in a general and adaptable matrix form. By adding the continuity of temperature, particle velocity, normal stress and heat flux between the layers, we obtain a closed system of equations, which allows for the calculation of all the acoustic variables at any position and for any input frequency and power. The proposed technique is then applied to several thermophone archi-tectures working in air or in water, and the results are discussed and compared to those of some recent theoretical and experimental investigations. Finally, the approach elaborated here is useful for unifying various theories proposed for distinct thermophone systems and to generalize these approaches in terms of different geometrical and physical features .
Published: 2019
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34. Dynamics of Magnetization in Multilayer TbCo / FeCo Structures under the Influence of Femtosecond Optical Excitation

Author: A. S. Sigov, Vladimir Preobrazhensky, A. A. Klimov, N. A. Ilyin, K. A. Brekhov, Mikhail Gaponov, Elena Mishina, Nicolas Tiercelin, and Philippe Pernod
Subjects: optical control of magnetization, magnetic heterostructures, Information theory, Materials science, Condensed matter physics, Spintronics, Magnetism, femtosecond laser light, 02 engineering and technology, 021001 nanoscience & nanotechnology, ultrafast demagnetization, 01 natural sciences, ultrafast change in magnetic anisotropy, Magnetization, Magnetic anisotropy, Ferromagnetism, 0103 physical sciences, General Earth and Planetary Sciences, Q350-390, 010306 general physics, 0210 nano-technology, Anisotropy, Ultrashort pulse, Excitation, General Environmental Science
Abstract: The need to study ultrafast processes in magnetism is due to the prospects for creating ultrafast magnetic recording and ultrafast spintronic devices. In order to excite the magnetic subsystem femtosecond optical pulses are used. The excitement is manifested as in spin precession. In metals, the material is heated first due to significant optical absorption, and significant Joule losses occur. The most important task is to search for materials in which spin processes are excited without heating. Obvious candidates are weakly absorbing materials, such as ferrite garnets. However, the range of such materials and the range of their functionality are limited.The purpose of this work is to study the dynamics of systems with nonthermal mechanisms of spin precession excitation. Such excitation is possible in ferromagnetic / antiferromagnetic heterostructures with exchange interaction, provided that the recombination time of photocarriers is shorter than the time of heat diffusion. Multilayer TbCo / FeCo structures of the near IR range were investigated for a femtosecond optical pulse. The spin dynamics are compared with the direction of the wave vector of the exciting pulse along and perpendicular to the axis of easy magnetization of the structures (“easy axis” and “hard axis” geometry, respectively). It is shown that in case of “easy axis” geometry the determinative mechanism is the thermal interaction. When the system is exposed to an excitation pulse, this mechanism leads to a decrease in the projection of magnetization on the direction of propagation of the test beam. In case of “hard axis” geometry, the magnetization turns to the magnetic field at the initial stage. Then it precesses and relaxes to an equilibrium angular orientation. Such dynamics indicate a rapid recovery of the uniaxial anisotropy field after laser irradiation. The presented results demonstrate an ultrafast change in the magnetic anisotropy induced during the fabrication of the heterostructure under study, which may be of interest for optical control of the orientation of the magnetization.
Published: 2019
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35. Measurements of Interfacial Tension Coefficient Using Excitation of Progressive Capillary Waves by Radiation Pressure of Ultrasound in Microgravity

Author: L. M. Krutyansky, Farzam Zoueshtiagh, A. P. Brysev, Dmitrii Makalkin, Philippe Pernod, Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), and Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN)
Subjects: [PHYS]Physics [physics], Capillary wave, Materials science, Capillary action, business.industry, Applied Mathematics, Ultrasound, General Engineering, General Physics and Astronomy, Mechanics, 01 natural sciences, 010305 fluids & plasmas, Physics::Fluid Dynamics, Surface tension, [SPI]Engineering Sciences [physics], Volume (thermodynamics), Radiation pressure, Modeling and Simulation, 0103 physical sciences, 010306 general physics, business, Beam (structure), Excitation
Abstract: International audience; A method dedicated to the measurement of low surface tension coefficients in binary fluids is proposed. The method which is not intrusive and does not interfere with the volume/weight proportion of liquid composing the binary mixture utilizes excitation of progressive capillary waves by pulsed radiation pressure force of focused ultrasound beam. A known dispersion relationship for gravity-capillary waves is used to evaluate the surface tension coefficient. The experiments are carried out in microgravity conditions in order to make the capillary term of the relationship strongly dominant and thus to reduce artifacts in acquired data.
Published: 2019
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36. Experimental Evidence of the Existence of Bound States in the Continuum and Fano Resonances in Solid-Liquid Layered Media

Author: Cécile Ghouila-Houri, E. H. El Boudouti, L. M. Krutyansky, Philippe Pernod, Abdelkrim Talbi, Bahram Djafari-Rouhani, Madiha Amrani, Ilyasse Quotane, Bogdan Piwakowski, LPMR, Department de Physique, Faculty of science, University Mohammed I, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Siberian Branch of the Russian Academy of Sciences (SB RAS), Transduction, Propagation et Imagerie Acoustique - IEMN (TPIA - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille Institut (CLIL), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Physique - IEMN (PHYSIQUE - IEMN), no information, Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Prokhorov General Physics Institute of the Russian Academy of Sciences, INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN)
Subjects: [PHYS]Physics [physics], Physics, Acoustic metamaterials, Superluminal motion, Condensed matter physics, Continuum (design consultancy), Bound states, General Physics and Astronomy, Fano resonance, Mechanical properties, 02 engineering and technology, Decoupling (cosmology), 021001 nanoscience & nanotechnology, 01 natural sciences, Spectral line, Elasticity, Transverse plane, [SPI]Engineering Sciences [physics], Transmission (telecommunications), 0103 physical sciences, Bound state, Acoustical properties, [INFO]Computer Science [cs], 010306 general physics, 0210 nano-technology
Abstract: International audience; Bound states in continuum (BICs) are resonances with zero width (infinite lifetime) without any leakage into the surrounding media. Their fascinating properties and potential applications have attracted a great deal of interest. In this paper, we give an analytical, numerical, and experimental demonstration of BICs in simple acoustic structures based on either a single solid layer or a triple solid-liquid-solid layer inserted between two liquids. These modes are an intrinsic property of the inserted structure (solid layer or solid-liquid-solid triple layer) with free surfaces and are independent of the surrounding media. Two kinds of BICs are discussed: (i) Fabry-Perot (FP) BICs exist as the consequence of the intersection of the local resonances induced by inserted structure intersect the transmission zeros induced by the solid layers. (ii) Symmetry-protected (SP) BICs occur when appear at normal incidence due to the decoupling of the transverse modes in the solid layer from the longitudinal modes that propagate in the solid and solid-liquid multilayer media. When the incidence angle departs slightly from the BIC conditions, the latter transform into Fano resonances characterized by an asymmetric line shape in the transmission spectra. In addition, we show that the transmission zeros give rise to negative delay times and therefore acoustic superluminal effect. The theoretical results are obtained by means of the Green’s function method, whereas the experimental measurements are carried out in ultrasonic domain using plexiglass plates in water. These results may have important applications to realize subsonic and acoustic superluminal phenomena as well as acoustic filters and sensors.
Published: 2021
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37. Thermoacoustic wave generation in multilayered thermophones with cylindrical and spherical geometries

Author: R. Lardat, Philippe Pernod, Stefano Giordano, Pierre Guiraud, Olivier Bou Matar, Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520 (IEMN), Université de Lille-Université Polytechnique Hauts-de-France (UPHF)-Ecole Centrale de Lille-Centre National de la Recherche Scientifique (CNRS)-JUNIA (JUNIA), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Université de Lille-Université Polytechnique Hauts-de-France (UPHF)-Ecole Centrale de Lille-Centre National de la Recherche Scientifique (CNRS)-JUNIA (JUNIA)-Université de Lille-Université Polytechnique Hauts-de-France (UPHF)-Ecole Centrale de Lille-Centre National de la Recherche Scientifique (CNRS)-JUNIA (JUNIA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520 (IEMN), Université de Lille-Université Polytechnique Hauts-de-France (UPHF)-Ecole Centrale de Lille-Centre National de la Recherche Scientifique (CNRS)-JUNIA (JUNIA)-Université de Lille-Université Polytechnique Hauts-de-France (UPHF)-Ecole Centrale de Lille-Centre National de la Recherche Scientifique (CNRS)-JUNIA (JUNIA), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Ecole Centrale de Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Thales Underwater Systems (TUS), THALES, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN], Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN [AIMAN-FILMS - IEMN], Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: 010302 applied physics, Physics, [PHYS]Physics [physics], Continuum mechanics, General Physics and Astronomy, 02 engineering and technology, Mechanics, 021001 nanoscience & nanotechnology, Thermal conduction, 01 natural sciences, [PHYS.MECA.ACOU]Physics [physics]/Mechanics [physics]/Acoustics [physics.class-ph], Power (physics), Matrix (mathematics), [SPI]Engineering Sciences [physics], Heat flux, Position (vector), 0103 physical sciences, Particle velocity, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, Representation (mathematics)
Abstract: International audience; A thermoacoustic sound generation model, based on the classical balance equations of the continuum mechanics, is here developed for the cylindrical and the spherical thermoacoustic wave generation. In both geometries, the model considers an arbitrary multilayered structure, where each layer can be fluid or solid and it is characterized by the fully coupled thermo-visco-acoustic response. It means that the viscous behavior and the thermal conduction are considered in each layer. The model is based on a unified representation of cylindrical or spherical thermoacoustic waves, which is valid for both fluid and solid phases. Thanks to the continuity of temperature, particle velocity, normal stress and heat flux between adjacent layers, the model can be implemented by means of a versatile matrix approach, allowing flexible analysis and design of cylindrical or spherical thermophones. Any thermoacoustic variable can be determined at any position, any frequency and for any input power. The results are compared with the models already existing in the literature and the underlying physics is thoroughly discussed. The analysis is focused on the better understanding of the thermoacoustic generation with application to the state of the art of the thermophone technology.
Published: 2021
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38. Polarization control of THz emission using spin-reorientation transition in spintronic heterostructure

Author: Alexey Klimov, A. M. Buryakov, Alexander Sigov, Mikhail Gaponov, Nicolas Tiercelin, Elena Mishina, V. S. Nozdrin, Philippe Pernod, Sergei Ovcharenko, D. I. Khusyainov, Vladimir Preobrazhensky, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Renatech Network, Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: Photon, Science, Optical spectroscopy, 02 engineering and technology, 01 natural sciences, Electromagnetic radiation, Article, Magnetization, Surfaces, interfaces and thin films, Magnetic properties and materials, 0103 physical sciences, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 010306 general physics, Terahertz optics, Ultrafast lasers, Physics, Multidisciplinary, Condensed matter physics, Magnetic moment, Structural properties, Optoelectronic devices and components, Spintronics, 021001 nanoscience & nanotechnology, Polarization (waves), Magnetic field, Surfaces, Magnetic anisotropy, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, Phase transitions and critical phenomena, interfaces and thin films, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Medicine, Light emission, Magneto-optics, 0210 nano-technology
Abstract: Polarization of electromagnetic waves plays an extremely important role in interaction of radiation with matter. In particular, interaction of polarized waves with ordered matter strongly depends on orientation and symmetry of vibrations of chemical bonds in crystals. In quantum technologies, the polarization of photons is considered as a “degree of freedom”, which is one of the main parameters that ensure efficient quantum computing. However, even for visible light, polarization control is in most cases separated from light emission. In this paper, we report on a new type of polarization control, implemented directly in a spintronic terahertz emitter. The principle of control, realized by a weak magnetic field at room temperature, is based on a spin-reorientation transition (SRT) in an intermetallic heterostructure TbCo2/FeCo with uniaxial in-plane magnetic anisotropy. SRT is implemented under magnetic field of variable strength but of a fixed direction, orthogonal to the easy magnetization axis. Variation of the magnetic field strength in the angular (canted) phase of the SRT causes magnetization rotation without changing its magnitude. The charge current excited by the spin-to-charge conversion is orthogonal to the magnetization. As a result, THz polarization rotates synchronously with magnetization when magnetic field strength changes. Importantly, the radiation intensity does not change in this case. Control of polarization by SRT is applicable regardless of the spintronic mechanism of the THz emission, provided that the polarization direction is determined by the magnetic moment orientation. The results obtained open the prospect for the development of the SRT approach for THz emission control.
Published: 2021
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39. Optimization of Reactive-Ion Etching (RIE) parameters to maximize the lateral etch rate of silicon using SF6/N2 gas mixture: An alternative to etching Si in MEMS with Au components

Author: Abdelkrim Talbi, T. Arnoult, S. Hammami, Cécile Ghouila-Houri, Philippe Pernod, M. Kazar Mendes, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), The authors would like to thank SERB, India for Extra Mural Research Funding (EMR/2017/003117)., Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and Renatech Network
Subjects: Materials science, Silicon, chemistry.chemical_element, Au Thin films, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, Etching (microfabrication), DOE, General Materials Science, Isotropic Si RIE, Reactive-ion etching, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Microstructure, Microelectromechanical systems, business.industry, Mechanical Engineering, Isotropy, SF6/N2 plasma, Plasma, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Volumetric flow rate, MEMS, chemistry, Mechanics of Materials, Torr, Optoelectronics, 0210 nano-technology, business
Abstract: International audience; In this work, the effects of the N2 addition to the SF6 plasma used in the isotropic silicon etching of Microelectromechanical systems (MEMS) with Au components are investigated. A four-variables Doehlert design was implemented for optimizing the etching parameters (power, pressure, gas flow rate, and N2 /SF6 ratio) to maximize the lateral etch rate of Si using SF6 /N2 gas mixture. The optimized etch condition founded for a lateral etch rate of 1.8 mm/min was: power = 143 W, chamber pressure = 86 mTorr, flow rate = 22 sccm, and N2 /SF6 ratio = 0.1. Furthermore, it was demonstrated that the established etching process avoids the structure damage of Au components.
Published: 2021
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40. MEMS High Temperature Gradient Sensor for Skin-Friction Measurements in Highly Turbulent Flows

Author: Pascal Molton, Cécile Ghouila-Houri, Eric Garnier, Quentin Gallas, Romain Viard, Alain Merlen, Jerome Delva, Abdelkrim Talbi, Philippe Pernod, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire de Mécanique des Fluides de Lille – Kampé de Fériet - UMR 9014 (LMFL), Centrale Lille-ONERA-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), DAAA, ONERA, Université Paris Saclay [Meudon], ONERA-Université Paris-Saclay, +CPER ELSAT 2020 project, This work was supported in part by the French National Research Agency (ANR) in the framework of the ANR ASTRID 'CAMELOTT' Project under Grant ANR-14-ASTR-0023-01, in part by the regional platform CONTRAERO in the framework of the CPER ELSAT 2020 project. T, Renatech Network, ANR-14-ASTR-0023,CAMELOTT,Capteurs et Actionneurs MEMS pour Le ConTrôle réactif de décollement sur voleT(2014), European Project, Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and HESAM Université (HESAM)-HESAM Université (HESAM)
Subjects: Materials science, Temperature measurement, 7. Clean energy, 01 natural sciences, MEMS SENSOR, 010305 fluids & plasmas, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Physics::Fluid Dynamics, symbols.namesake, SKIN-FRICTION MEASUREMENT, Parasitic drag, Wide dynamic range, 0103 physical sciences, Shear stress, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electrical and Electronic Engineering, Aerospace engineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Instrumentation, Wind tunnel, Microelectromechanical systems, business.industry, Turbulence, 010401 analytical chemistry, Aerodynamics, Mechanics, 0104 chemical sciences, Temperature gradient, Mach number, Power consumption, symbols, business, Microfabrication
Abstract: This article was presented in part at the IEEE Sensors 2019 and in part at the Selected Papers from the IEEE SENSORS 2019 Conference.; International audience; This paper presents and discusses the results obtained with a MEMS (Micro-Electro-Mechanical System) high temperature gradient sensor for time-averaged and fluctuating skin-friction measurements in highly turbulent flows. Designed as a robust wall-mounted suspended hot-wire structure, the micro-sensor was made using conventional microfabrication techniques, compatible with microelectronics for designing integrated smart systems. Successfully implemented into two air wind tunnels, the sensor was tested in a large range of turbulent flows, with mainstream velocities going up to 270 m/s (Mach number of 0.79), which corresponds to the mean velocity of airliner cruise flights. The experiments demonstrated the wide dynamic range of the micro-sensor without reaching its limits. The micro-sensor thereby demonstrated its value for measuring turbulence in aerodynamic applications, being particularly suitable for aeronautics.
Published: 2021
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41. Magneto-mechanical micro-valve for active flow control

Author: Abdelkrim Talbi, Cécile Ghouila-Houri, Romain Viard, A. Merlen, Philippe Pernod, Azeddine Kourta, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Laboratoire pluridisciplinaire de recherche en ingénierie des systèmes, mécanique et énergétique (PRISME), Université d'Orléans (UO)-Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Renatech Network, Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), CNRT-R2A, RENATECH, French national nanofabrication network, FEDER, and CPER ELSAT 2020 project
Subjects: 010302 applied physics, Fabrication, Materials science, Acoustics, Airflow, Metals and Alloys, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph], Flow control (fluid), Resonator, Surface micromachining, Drag, Electromagnetic coil, Magnet, 0103 physical sciences, Electrical and Electronic Engineering, 0210 nano-technology, Instrumentation
Abstract: International audience; This paper presents and discusses the development of a normally-off magneto-mechanical airflow microvalve designed for active aerodynamic flow control application. The architecture of the microvalve is composed of a highly flexible mechanical resonator, a miniature coil enabling the magnetic resonator actuation and a packaging with oval shape. The resonator system consists in an elastomer membrane and miniature magnets. The device fabrication process is based on micro-molding, micromachining and rapid prototyping. The pulsed micro-jet delivered by this microvalve can be used at different duty cycles and frequencies going up to 750 Hz. The micro-jet velocity reached 100 m/s for a corresponding airflow rate of 3 L/min. An array of twenty microvalves was implemented on an Ahmed body model and separation flow control experiments were successfully performed. The actuation provided by the micro-jets decreased by 4.3 % the drag on the vehicle-like shape.
Published: 2020
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42. Spatial waveform analysis of ultrasonically excited capillary waves for measurements of interfacial tension coefficient in microgravity

Author: Farzam Zoueshtiagh, L. M. Krutyansky, Philippe Pernod, Siberian Branch of the Russian Academy of Sciences (SB RAS), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), French National Space Agency (CNES)Centre National D'etudes Spatiales, Program of Invited professors of Centrale Lille, French National Centre for Scientific Research (CNRS)Centre National de la Recherche Scientifique (CNRS) [18-52-16001], Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-52-16001], Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)
Subjects: Data processing, Capillary wave, Materials science, Surface tension, Applied Mathematics, General Engineering, General Physics and Astronomy, Mechanics, Spatial domain, 01 natural sciences, 010305 fluids & plasmas, [SPI]Engineering Sciences [physics], Volume (thermodynamics), Radiation pressure, Modeling and Simulation, Excited state, 0103 physical sciences, Waveform, Time domain, Microgravity, 010306 general physics, Radiation pressure of ultrasound, Pulsed capillary waves, Waveforms
Abstract: International audience; A simplified method for measurements of low interfacial tension coefficient which is applicable for binary mixtures is proposed. The technique is based on generating progressive capillary waves at a liquid interface by radiation pressure of a short ultrasound pulse in microgravity condition. The waveforms are then processed in the spatial domain. The method presents the advantage of strongly reducing data volume of necessary images for analysis and, consequently, significantly minimizing both data processing and time expenses thanks to the analysis in spatial domain instead of time domain as hitherto reported in the literature.
Published: 2020
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43. Thermophone or the future of ultrasound transducers: Modelling of thermoacoustics generation in porous materials

Author: Pierre Guiraud, Stefano Giordano, Olivier Bou Matar, Philippe PERNOD, Raphael Lardat, Zhi Lin Ngoh, Dunlin Tan, Edwin Hang Tong Teo, Philippe Coquet, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)
Subjects: [PHYS]Physics [physics], [SPI]Engineering Sciences [physics]
Abstract: International audience; Electroacoustic transducers along with piezoelectric devices are the most widely used methods for acoustic sound generation in gas and liquids. A mechanical movement of a membrane induces fluid vibration thus creating an acoustic wave. The thermoacoustic process on the other hand uses fast paces temperature variations in a sample to excite the fluid (generally air). The rapidly changing temperature generate a compression expansion of the air and thus creates an acoustical wave. Such materials are called thermophones. They were discovered in the same time period as traditional electroacoustic transducers but their limited efficiency coupled with the technological limits of fabrication prevented scientific craze at the time. In 1999 a new thermophone was presented with a significant improvement compared to the samples used a century prior. This article coupled with the newly found ease of access to complex fabrication process of nanomaterials rekindle the interest in thermoacoustic for audio purposes. In this work a thorough literature review is presented and a novel multilayer model for thermoacoustic sound generation is derived. This model was solved for plane wave, cylindrical wave and spherical wave generation. Another model based on a two temperatures hypothesis for plane wave generation is also solved to represent more accurately the generation of thick porous thermophones. An extensive analysis of those models allowed for a detailed understanding of the thermoacoustic sound generation: its strengths, weaknesses and differences with traditional speakers. Lastly, experimental investigations of porous carbon foams in partnership with CINTRA Singapore are presented. Validation of the models and insights about the handling of such flexible and lightweighted but fragile samples are presented as well at their potential applications for scientific or commercial purposes as broad band sensors.
Published: 2020

44. Hybridization of Love surface acoustic waves in SiO2/ST-Quartz structure with resonant pillars grafted on the meta-surface

Author: Cécile Ghouila-Houri, Yuxin Liu, Olivier Bou Matar, Abdelkrim Talbi, Philippe Pernod, Bahram Djafari-Rouhani, E. H. El Boudouti, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), LPMR, Department de Physique, Faculty of science, University Mohammed I, Université Lille Nord de France (COMUE), Physique-IEMN (PHYSIQUE-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), and Physique - IEMN (PHYSIQUE - IEMN)
Subjects: 010302 applied physics, Coupling, Shear waves, Cavity modes, Materials science, business.industry, Resonance, 02 engineering and technology, Acoustic wave, 021001 nanoscience & nanotechnology, 01 natural sciences, Shear Waves, Electroacoustic, Crystal, [SPI]Engineering Sciences [physics], Resonator, Love wave, Q factor, 0103 physical sciences, Optoelectronics, Phononic Crystal, 0210 nano-technology, business, Love waves
Abstract: poster; International audience; The control of propagating waves can be achieved by introducing defect states in the phononic structure of the electroacoustic devices. This work investigates the interaction of Love waves in cavity-containing holey SiO2/Quartz structure with grafted Ni pillars. An optimal sized cavity in the holey PnC enables to obtain a cavity mode that matches the torsional resonance mode of the pillars. We showed that the cavity mode/Pillar resonance coupling depends drastically on the positions of pillars related to nodes and anti-nodes of the cavity mode. These effects are used to design a micro-electromechanical resonator presenting high quality factor without increasing the crystal size in comparison to cavity without pillars.
Published: 2020
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45. Aerodynamic wall pressure measurement using a high temperature gradient Pirani micro-sensor

Author: T. Arnoult, Philippe Pernod, Romain Viard, Eric Garnier, Cécile Ghouila-Houri, Q. Gallas, M. Kazar-Mendes, A. Merlen, Abdelkrim Talbi, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), JMH Conception F- 68100 Mulhouse, France, DAAA, ONERA, Université Paris Saclay [Meudon], ONERA-Université Paris-Saclay, ANR ASTRID 'CAMELOTT' Project. It is supported by the regional platform CONTRAERO in the framework of the CPER ELSAT 2020 Project. The authors also thank RENATECH, the French national nanofabrication network, and FEDER., Renatech Network, ANR-14-ASTR-0023,CAMELOTT,Capteurs et Actionneurs MEMS pour Le ConTrôle réactif de décollement sur voleT(2014), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: Materials science, Pressure sensor, 02 engineering and technology, Pirani sensor, 7. Clean energy, 01 natural sciences, Temperature measurement, 010305 fluids & plasmas, law.invention, [SPI]Engineering Sciences [physics], law, 0103 physical sciences, [CHIM]Chemical Sciences, [INFO]Computer Science [cs], [MATH]Mathematics [math], Aerodynamic wall pressure, Wind tunnel, [PHYS]Physics [physics], Aerodynamics, Mechanics, 021001 nanoscience & nanotechnology, MEMS, Temperature gradient, Boundary layer, Pressure measurement, Flow velocity, 0210 nano-technology
Abstract: International audience; This paper presents and discusses the first demonstration of aerodynamic wall pressure measurement using a thermal Pirani effect based micro-sensor. The thermal micro-sensor is designed as a suspended micro-hot-wire separated from the substrate by a nanoscale gap, and mechanically supported by perpendicular micro-bridges. The micro-sensor was calibrated for pressure measurement from 10 kPa to 800 kPa. It was then used as aerodynamic wall pressure sensor in a turbulent boundary layer wind tunnel and successfully measured the 1.1 kPa depression occurring in the wind tunnel when the flow velocity goes up to 40 m/s.
Published: 2020
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46. Ferromagnetism in the Ferromagnetic Yttrium Iron Garnet Film/Ferromagnetic Intermetallic Compound Heterostructure

Author: Nicolas Tiercelin, Karen Y. Constantinian, K. L. Stankevich, S. A. Nikitov, T. A. Shaikhulov, Philippe Pernod, Alexey Klimov, Gennady A. Ovsyannikov, V. V. Demidov, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), and Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN)
Subjects: Materials science, Superlattice, Yttrium iron garnet, Intermetallic, 01 natural sciences, chemistry.chemical_compound, Condensed Matter::Materials Science, [SPI]Engineering Sciences [physics], 0103 physical sciences, 010306 general physics, 010302 applied physics, [PHYS]Physics [physics], magnetic anisotropy, spin current, Condensed matter physics, superlattice, Magnetostriction, heterostructure, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, Ferromagnetic resonance, Electronic, Optical and Magnetic Materials, Magnetic field, Magnetic anisotropy, Ferromagnetism, chemistry, ferromagnetic resonance
Abstract: International audience; We report on the investigations of the magnetic properties and ferromagnetic resonance in the het-erostructure consisting of an epitaxial yttrium iron garnet (Y 3 Fe 5 O 12) film and a nanometer rare-earth inter-metallic superlattice comprised of the (TbCo 2 /FeCo) n exchange-coupled layers. The (TbCo 2 /FeCo) n super-lattice exhibits the giant magnetostriction and the controlled magnetic anisotropy induced by a magnetic field or elastic stresses. The magnetic interaction of the films in the (TbCo 2 /FeCo) n /Y 3 Fe 5 O 12 heterostructure has been experimentally established and the spin current flowing through their interface has been detected.
Published: 2020
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47. Ultrafast magnetization dynamics in the vicinity of spin reorientation transition in TbCo 2 /FeCo heterostructures

Author: Philippe Pernod, Alexey Klimov, N. A. Ilyin, A. S. Sigov, Elena Mishina, Mikhail Gaponov, Nicolas Tiercelin, Vladimir Preobrazhensky, Sergei Ovcharenko, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), and Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN)
Subjects: 010302 applied physics, [PHYS]Physics [physics], Magnetization dynamics, Kerr effect, Materials science, Magnetic moment, Spintronics, Condensed matter physics, Field strength, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Magnetic field, Magnetic anisotropy, Magnetization, [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism, 0103 physical sciences, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, General Materials Science, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS
Abstract: The magnetic moment dynamics excited by 35 fs laser pulses in TbCo2/FeCo heterostructure is experimentally investigated by pump-probe technique. The studies are carried out in two typical geometries with magnetizing field perpendicular and along to the easy magnetization axis. In the 'easy axis' orientation, high-frequency oscillations of magnetic moments odd with respect to the sign of the magnetizing field are observed using the magneto-optical Kerr effect. In the perpendicular 'hard axis' orientation corresponding to the spin reorientation phase, the experiment shows oscillations that are even with respect to the field. The maximum angle of Kerr rotation as a function of the magnetizing field strength depicts a specific hysteretic loop that reveals ultrafast optical control of uniaxial magnetic anisotropy originally induced during deposition of the heterostructure in a DC magnetic field. The results provide new ways of ultrafast control of magnetic states in exchange coupled intermetallic heterostructures designed for spintronic applications.
Published: 2020
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48. Giant Magnetoelastic Coupling in a Love Acoustic Waveguide Based on TbCo2 / Fe Co Nanostructured Film on ST-Cut Quartz

Author: Abdelkrim Talbi, Aurélien Mazzamurro, Olivier Bou Matar, Y. Dusch, Ahmed Addad, Nicolas Tiercelin, and Philippe Pernod
Subjects: 010302 applied physics, Materials science, Condensed matter physics, Surface acoustic wave, General Physics and Astronomy, 02 engineering and technology, Acoustic wave, 021001 nanoscience & nanotechnology, Polarization (waves), 01 natural sciences, Magnetic field, Wavelength, 0103 physical sciences, Sensitivity (control systems), Transmission coefficient, Phase velocity, 0210 nano-technology
Abstract: In this work, we propose a theoretical and experimental investigation of the interaction of guided pure shear-horizontal (SH) wave within a uniaxial multilayered ${\mathrm{Tb}\mathrm{Co}}_{2}$/$\mathrm{Fe}$$\mathrm{Co}$ thin film deposited on ST-$\mathrm{X}{90}^{\ensuremath{\circ}}$-cut quartz in a delay-line configuration. We evaluate theoretically the evolution of phase velocity as a function of magnetic field and experimentally the variation of ${S}_{21}$ transmission coefficient (amplitude and phase). An equivalent piezomagnetic model based on pure magnetoelastic coupling is used (developed to allow us) to calculate the elastic stiffness constants of the multilayer as a function of the bias magnetic field. The model is also implemented for the calculation of acoustic waves' dispersion curves. We show that the evolution of the phase velocity with respect to the bias magnetic field is dominated by the ${C}_{66}$ elastic stiffness constant as expected for the case of shear-horizontal surface acoustic wave. In the fabricated device, both fundamental and third-harmonic shear mode are excited at 410 MHz and 1.2 GHz, respectively. For both modes, the theoretical and experimental results are in agreement. At 1.2 GHz, the guiding of the acoustic wave in the ferromagnetic thin film enhances the sensitivity to the bias magnetic field with a maximum phase-velocity shift close to 2.5% and an attenuation reaching 500 dB/cm, for a sensitivity as high as 250 ppm/Oe, which is better than what has been reported in the literature so far. We also report that, from a specific ratio between the thin-film thickness and the acoustic wavelength, the bias magnetic field can induce a breaking of the acoustic wave polarization, leading to an acoustic mode conversion.
Published: 2020
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49. Equilibrium Distribution of Magnetization and Processes of Magnetization Reversal in Magnetoelastic Nanostructures

Author: Philippe Pernod, S. A. Nikitov, N. Tiercelin, M. V. Logunov, M. P. Temiryazeva, Yannick Dusch, Stefano Giordano, A. G. Temiryazev, Théo Mathurin, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)
Subjects: 010302 applied physics, [PHYS]Physics [physics], Materials science, Condensed matter physics, 010308 nuclear & particles physics, General Physics and Astronomy, Magnetostatics, 01 natural sciences, Symmetry (physics), Magnetization, Magnetic anisotropy, Condensed Matter::Materials Science, [SPI]Engineering Sciences [physics], Domain wall (magnetism), Ferromagnetism, Electric field, 0103 physical sciences, Perpendicular, [NLIN]Nonlinear Sciences [physics]
Abstract: International audience; Results are presented from an experimental study of the equilibrium distribution of magnetization and processes of magnetization reversal of magnetoelastic nanostructures in the form of strips with constant or variable width. It is shown that the symmetry of the stable magnetization states in the nanostrip can be broken by a static magnetic field applied perpendicular to the ferromagnet's easy axis. A further change in the states of magnetization allows their manipulation (e.g., moving the domain wall) using the homogeneous mechanical effects induced by applying an electric field to the piezoelectric substrate.
Published: 2020
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50. E-field control of magnetization and susceptibility of AFE-based YIG/PLZST heterostructure

Author: Philippe Pernod, Liuyang Han, Freddy Ponchel, Denis Remiens, Genshui Wang, Tuami Lasri, Nicolas Tiercelin, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Matériaux et Acoustiques pour MIcro et NAno systèmes intégrés - IEMN (MAMINA - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Microtechnology and Instrumentation for Thermal and Electromagnetic Characterization - IEMN (MITEC - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN)
Subjects: Phase transition, Converse magnetoelectric coefficient, Materials science, Multiferroics, Yttrium iron garnet, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Magnetization, [SPI.MAT]Engineering Sciences [physics]/Materials, Magnetic susceptibility, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], Electric field, General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Antiferroelectric, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Condensed matter physics, Mechanical Engineering, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, Magnetic field, chemistry, Ferromagnetism, Mechanics of Materials, 0210 nano-technology
Abstract: International audience; The magnetoelectric properties of a laminated heterostructure consisting of ferromagnetic yttrium iron garnet (YIG) film and antiferroelectric (Pb0.97La0.02) (Zr0.6Sn0.3Ti0.1)O3 (PLZST) ceramic is, for the first time, reported in this work. The electric-field-controlled susceptibility, a shift of the coercive magnetic field and magnetization variations are demonstrated in YIG/PLZST multiferroic heterostructure. A large variation of the relative magnetic susceptibility is observed, practically 33% at a low magnetic field of 10 Oe. A sharp reduction of magnetization occurs at the antiferroelectric-ferroelectric phase transition field of PLZST ceramic. Thus the converse magnetoelectric coefficient peaks at the switching field and the maximum can reach 11.6 × 10 −8 s/m without bias magnetic field. These features indicate that antiferroelectric materials can also be alternative candidates to combine with ferromagnetic materials for magnetoelectric tunable devices.
Published: 2020
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