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10 results on '"Zaccaro, Julien"'

1. Conical spin order with chiral quadrupole helix in CsCuCl3

Author

Ueda, Hiroki, Skoropata, Elizabeth, Burian, Max, Ukleev, Victor, Perren, Gérard Sylvester, Leroy, Ludmila, Zaccaro, Julien, and Staub, Urs

Subjects
Condensed Matter - Strongly Correlated Electrons, Strongly Correlated Electrons (cond-mat.str-el), FOS: Physical sciences
Abstract

Here we report a resonant x-ray diffraction (RXD) study at the Cu L3 edge on the multi-chiral system CsCuCl3, exhibiting helical magnetic order in a chiral crystal structure. RXD is a powerful technique to disentangle electronic degrees of freedom due to its sensitivity to electric monopoles (charge), magnetic dipoles (spin), and electric quadrupoles (orbital). We characterize electric quadrupole moments around Cu ascribed to the unoccupied Cu 3d orbital, whose quantization axis is off the basal plane. Detailed investigation of magnetic reflections reveals additional sinusoidal modulations along the principal axis superimposed on the reported helical structure, i.e., a longitudinal conical (helical-butterfly) structure. The out-of-plane modulations imply significant spin-orbit interaction despite S = 1/2 of Cu2+., 17 pages, 5 figures

Published
2022

2. Frequency conversion in the acentric tetragonal nonlinear crystal NaI_3O_8

Author

Guo, Feng, Segonds, Patricia, Zaccaro, Julien, Debray, Jérome, Gautier-Luneau, Isabelle, Boulanger, Benoit, Optique et Matériaux (OPTIMA ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Cristaux Massifs (CrisMass)

Subjects
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017
Full Text
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3. Bulk cylinders and spheres: from shaping to the use for linear and nonlinear optics

Author

Ménaert, Bertrand, Debray, Jérome, Zaccaro, Julien, Segonds, Patricia, Boulanger, Benoit, Cristaux Massifs (CrisMass), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Optique et Matériaux (OPTIMA )

Subjects
[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Physics::Optics, OCIS: 260.1180, 190.4400
Abstract

International audience; Bulk crystals cut and polished as spheres or cylinders are unique tools for measuring the angular distribution of any linear or nonlinear optical property as well as for designing widely and continuously tunable parametric devices. The aim of this article is to describe the specific techniques of shaping such high quality samples, and their use in methods of optical measurements and devices that we implemented.

Published
2017
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4. Nonlinear optical properties of the new acentric crystal NaI3O8

Author

Guo, Feng, Segonds, Patricia, Zaccaro, Julien, Debray, Jérôme, Gautier-Luneau, Isabelle, Boulanger, Benoit, Pena Revellez, Alexandra, Optique et Matériaux (OPTIMA ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), and Cristaux Massifs (CrisMass)

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2017

5. Phase-Matching Sellmeier Equations and Nonlinear Coefficientsof the New Nonlinear Crystals NaI3O8

Author

Guo, Feng, Segonds, Patricia, Zaccaro, Julien, Debray, Jérôme, Gautier-Luneau, Isabelle, Boulanger, Benoit, Optique et Matériaux (OPTIMA ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Cristaux Massifs (CrisMass), and Pena Revellez, Alexandra

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2016

6. Solution growths of remarkable phosphate crystals: From lab researches to industrial applications

Author

Ibanez, Alain, Zaccaro, Julien, Ménaert, Bertrand, Optique et Matériaux (OPTIMA), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Cristaux Massifs (CrisMass), and Ibanez, Alain

Subjects
[PHYS]Physics [physics], [CHIM.MATE] Chemical Sciences/Material chemistry, [CHIM] Chemical Sciences, [CHIM.CRIS]Chemical Sciences/Cristallography, [CHIM]Chemical Sciences, [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.CRIS] Chemical Sciences/Cristallography, [PHYS] Physics [physics]
Abstract

International audience; We will present the growth of several families of phosphates crystals, which exhibit remarkable properties such as high nonlinear optical efficiencies and piezoelectricity. As phosphate materials do not melt congruently due generally to partial decompositions at high temperatures, their crystal growth are performed by involving solvents. Thus, by taking several examples of phosphate crystal growths, we will introduce first different types of solution growth methods at low (close to room temperature) and high temperatures, (up to 1000°C), such as slow cooling, temperature gradient and flux methods. Indeed, we will illustrate all these techniques with examples taken from our studies at CNRS-Grenoble which include growth of hybrid organic inorganic salts, potassium dihydrogen phosphate (KDP) and crystals of the potassium titanyl phosphate family (KTP). Their crystal growths are motivated by the efficient properties for nonlinear optics to develop optical frequency conversion devices like optical parametric oscillators based on their non-centrosymmetric structures. In addition to these standard solution growth techniques, some more particular ones will be presented. Indeed, solution crystal growths, carried out under typical conditions at low supersaturations of the solutions (relative supersaturations σ of around 1%), exhibit low growth rates, less than 1mm/day. By applying an overheating and/or an ultrasonic treatment of the solution, it is possible to inhibit the spurious nucleation that take place at higher supersaturations. Thus, through this type of treatment of the solution during the crystal growth process, higher supersaturations can be applied, σ around 10-20%, and thus increase significantly the growth rates, over 1cm/day. These rapid crystal growths will be illustrated in the cases of potassium dihydrogen phosphate and hybrid organic-inorganic salts. Finally, hydrothermal techniques will be presented in the case of aluminum and gallium orthophosphate crystals, which are isomorphous to α-quartz. These crystals, exhibit promising piezoelectric properties for the development of resonators and physical sensors. Moreover, for all of these phosphate crystal growths, we will give examples of industrial processes, particularly for the growths of KDP, KTP and GaPO4 crystals.

Published
2015

7. First Angular Measurements of Absorption and Fluorescence in a Monoclinic Crystal

Author

Petit, Yannick, Boulanger, Benoit, Segonds, Patricia, Felix, Corinne, Ménaert, Bertrand, Zaccaro, Julien, Aka, Gérard, Optique et Matériaux (NEEL - OPTIMA), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Optique & Microscopies (NEEL - POM), Cristaux massifs (NEEL - CrisMass), Laboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) (LCMCP (site Paris VI)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Optique et Matériaux (OPTIMA), Optique et microscopies (POM), and Cristaux Massifs (CrisMass)

Subjects
[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2008

8. Cristaux laser non linéaires de borates

Author

Aka, G., Segonds, Patricia, Boulanger, Benoit, Ménaert, Bertrand, Zaccaro, Julien, Salvestrini, J. P., Fontana, M. D., Moncorge, R., Poree, F., Gadret, Grégory, Mangin, J., Brenier, A., Boulon, G., Pelenc, D., Laboratoire de Chimie Appliquée de l'État Solide ( LCAES ), Ecole Nationale Supérieure de Chimie de Paris- Chimie ParisTech-PSL ( ENSCP ) -Centre National de la Recherche Scientifique ( CNRS ), OPTIMA - Optique et Matériaux, Institut Néel ( NEEL ), Université Grenoble Alpes [Saint Martin d'Hères]-Centre National de la Recherche Scientifique ( CNRS ) -Université Grenoble Alpes [Saint Martin d'Hères]-Centre National de la Recherche Scientifique ( CNRS ), CrisMass - Cristaux Massifs, Laboratoire Matériaux Optiques, Photonique et Systèmes ( LMOPS ), CentraleSupélec-Université de Lorraine ( UL ), Centre de recherche sur les Ions, les MAtériaux et la Photonique ( CIMAP - UMR 6252 ), Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -Ecole Nationale Supérieure d'Ingénieurs de Caen ( ENSICAEN ), Normandie Université ( NU ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physico-Chimie des Matériaux Luminescents ( LPCML ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire d'Electronique et des Technologies de l'Information ( CEA-LETI ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Grenoble Alpes [Saint Martin d'Hères], Klein, Sandra, Laboratoire de Chimie Appliquée de l'État Solide (LCAES), Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Optique et Matériaux (NEEL - OPTIMA), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Cristaux massifs (NEEL - CrisMass), Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), CentraleSupélec-Université de Lorraine (UL), Centre de recherche sur les Ions, les MAtériaux et la Photonique (CIMAP - UMR 6252), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physico-Chimie des Matériaux Luminescents (LPCML), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Optique et Matériaux (OPTIMA), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF), Cristaux Massifs (CrisMass), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon

Subjects
[PHYS]Physics [physics], [PHYS] Physics [physics]
Published
2007

9. Spatial control of organic nanocyrstal nucleation in sol-gel thin films for 3D optical data storage devices or chemical multi-sensors

Author

Ibanez, A., Botzung-Appert, E., Zaccaro, Julien, Gourgon, C., Usson, Y., Baldeck, Patrice, Laboratoire des technologies de la microélectronique (LTM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Université Joseph Fourier - Grenoble 1 (UJF)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), and Clot, Marielle

Subjects
ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2005

10. Optical characterization of YCa4 O(BO3 )3 and Nd :YCa4 O(BO3 )3

Author

Segonds, P., Boulanger, B., Menaert, B., Zaccaro, Julien, Salvestrini, J.P., D. Fontana, M., Moncorge, R., Poree, F., Gadret, G., Mangin, J., Aka, G., Pelenc, D., Salvestrini, Jean Paul, Laboratoire Matériaux Optiques, Photonique et Systèmes (LMOPS), and CentraleSupélec-Université de Lorraine (UL)

Subjects
[PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Physics::Optics
Abstract

International audience; We report a complete optical characterization of YCa4O(BO3)3 and Nd:YCa4O(BO3)3 crystals. We studied the relative orientation between the dielectric and the crystallographic frames as a function of the wavelength and performed accurate phase-matching angles measurements for second harmonic generation, using a single crystal cut as a sphere. We also recorded polarized luminescence spectra of Nd:YCOB along the principal axes of the dielectric frame. For both crystals, we measured the gray-tracking and the thermo-optic properties as a function of temperature and wavelength using oriented slabs. Finally, we measured all their dielectric and electro-optic coefficients, as a function of frequency and wavelength.

Published
2004

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