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1. Understanding XANES spectra of two-temperature warm dense copper using ab initio simulation

Author

Jourdain, N., Recoules, V., Lecherbourg, L., Renaudin, P., and Dorchies, F.

Subjects
Condensed Matter - Materials Science, Physics - Plasma Physics
Abstract

Using ab initio molecular-dynamics simulations combined with linear-response theory, we studied the x-ray absorption near-edge spectra (XANES) of a two-temperature dense copper plasma. As the temperature increases, XANES spectra exhibit a pre-edge structure balanced by a reduction of the absorption just behind the edge. By performing systematic simulations for various thermodynamic conditions, we establish a formulation to deduce the electronic temperature Te directly from the spectral integral of the pre-edge that can be used for various thermodynamic conditions encountered in a femtosecond heating experiment where thermal non equilibrium and expanded states have to be considered., Comment: 9 pages, 10 figures submitted to Physical Review B

Published
2020
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2. Ultrafast Surface Plasmonic Switch in Non-Plasmonic Metals

Author

Bévillon, E., Colombier, J. P., Recoules, V., Zhang, H., Li, C., and Stoian, R.

Subjects
Physics - Optics, Condensed Matter - Materials Science
Abstract

We demonstrate that ultrafast carrier excitation can drastically affect electronic structures and induce brief surface plasmonic response in non-plasmonic metals, potentially creating a plasmonic switch. Using first-principles molecular dynamics and Kubo-Greenwood formalism for laser-excited tungsten we show that carrier heating mobilizes d electrons into collective inter and intraband transitions leading to a sign flip in the imaginary optical conductivity, activating plasmonic properties for the initial non-plasmonic phase. The drive for the optical evolution can be visualized as an increasingly damped quasi-resonance at visible frequencies for pumping carriers across a chemical potential located in a d-band pseudo-gap with energy-dependent degree of occupation. The subsequent evolution of optical indices for the excited material is confirmed by time-resolved ultrafast ellipsometry. The large optical tunability extends the existence spectral domain of surface plasmons in ranges typically claimed in laser self-organized nanostructuring. Non-equilibrium heating is thus a strong factor for engineering optical control of evanescent excitation waves, particularly important in laser nanostructuring strategies.

Published
2015
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3. Melting of iron close to Earth's inner core boundary conditions and beyond

Author

Harmand, M., Ravasio, A., Mazevet, S., Bouchet, J., Denoeud, A., Dorchies, F., Feng, Y., Fourment, C., Galtier, E ., Gaudin, J., Guyot, F., Kodama, R., Koenig, M., Lee, H. J., Miyanishi, K., Morard, G., Musella, R., Nagler, B., Nakatsutsumi, M., Ozaki, N., Recoules, V., Toleikis, S., Vinci, T., Zastrau, U., Zhu, D., and Benuzzi-Mounaix, A.

Subjects
Physics - Geophysics, Condensed Matter - Materials Science
Abstract

Several important geophysical features such as heat flux at the Core-Mantle Boundary or geodynamo production are intimately related with the temperature profile in the Earth's core. However, measuring the melting curve of iron at conditions corresponding to the Earth inner core boundary under pressure of 330 GPa has eluded scientists for several decades. Significant discrepancies in previously reported iron melting temperatures at high pressure have called into question the validity of dynamic measurements. We report measurements made with a novel approach using X-ray absorption spectroscopy using an X-ray free electron laser source coupled to a laser shock experiment. We determine the state of iron along the shock Hugoniot up to 420 GPa (+/- 50) and 10800 K (+/- 1390) and find an upper boundary for the melting curve of iron by detecting solid iron at 130 GPa and molten at 260, 380 and 420 GPa along the shock Hugoniot. Our result establishes unambiguous agreement between dynamic measurement and recent extrapolations from static data thus resolving the long-standing controversy over the reliability of using dynamic compression to study the melting of iron at conditions close to the Earth's inner core boundary and beyond., Comment: 9 pages 3 figures

Published
2014

5. Towards performing high-resolution inelastic X-ray scattering measurements at hard X-ray free-electron lasers coupled with energetic laser drivers

Author

Descamps, A., primary, Ofori-Okai, B. K., additional, Baldwin, J. K., additional, Chen, Z., additional, Fletcher, L. B., additional, Glenzer, S. H., additional, Hartley, N. J., additional, Hasting, J. B., additional, Khaghani, D., additional, Mo, M., additional, Nagler, B., additional, Recoules, V., additional, Redmer, R., additional, Schörner, M., additional, Sun, P., additional, Wang, Y. Q., additional, White, T. G., additional, and McBride, E. E., additional

Published
2022
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12. White-line evolution in shocked solid Ta evidenced by synchrotron x-ray absorption spectroscopy

Author

Pépin, C. M., primary, Torchio, R., additional, Occelli, F., additional, Lescoute, E., additional, Mathon, O., additional, Recoules, V., additional, Bouchet, J., additional, Videau, L., additional, Benuzzi-Mounaix, A., additional, Vinci, T., additional, Briggs, R., additional, Pascarelli, S., additional, Gaal, R., additional, Loubeyre, P., additional, and Sollier, A., additional

Published
2020
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15. X-ray absorption near edge spectroscopy study of warm dense MgO

Author

Bolis, R., primary, Hernandez, J.-A., additional, Recoules, V., additional, Guarguaglini, M., additional, Dorchies, F., additional, Jourdain, N., additional, Ravasio, A., additional, Vinci, T., additional, Brambrink, E., additional, Ozaki, N., additional, Bouchet, J., additional, Remus, F., additional, Musella, R., additional, Mazevet, S., additional, Hartley, N. J., additional, Guyot, F., additional, and Benuzzi-Mounaix, A., additional

Published
2019
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17. X-ray absorption near edge spectroscopy study of warm dense MgO

Author

(0000-0003-0881-5733) Bolis, R., (0000-0002-1860-0982) Hernandez, J.-A., Recoules, V., (0000-0002-2660-7543) Guarguaglini, M., (0000-0002-5922-9585) Dorchies, F., Jourdain, N., Ravasio, A., (0000-0002-1595-1752) Vinci, T., Brambrink, E., Ozaki, N., Bouchet, J., Remus, F., Musella, R., Mazevet, S., (0000-0002-6268-2436) Hartley, N., Guyot, F., Benuzzi-Mounaix, A., (0000-0003-0881-5733) Bolis, R., (0000-0002-1860-0982) Hernandez, J.-A., Recoules, V., (0000-0002-2660-7543) Guarguaglini, M., (0000-0002-5922-9585) Dorchies, F., Jourdain, N., Ravasio, A., (0000-0002-1595-1752) Vinci, T., Brambrink, E., Ozaki, N., Bouchet, J., Remus, F., Musella, R., Mazevet, S., (0000-0002-6268-2436) Hartley, N., Guyot, F., and Benuzzi-Mounaix, A.

Abstract

We report time-resolved X-ray Absorption Near Edge Spectroscopy (XANES) measurements of warm dense MgO. We used a high power nanosecond pulse to drive a strong uniform shock wave into an MgO sample, and a picosecond pulse to generate a broadband X-ray source near the Mg K-edge. We used this setup to obtain XANES spectra across a large area of the phase diagram, with densities up to 6.8 g/cc and temperatures up to 30 000 K, conditions at which no prior investigations of electronic and ionic structure exist. Our XANES results, together with quantum molecular dynamic simulations, demonstrate that the sample metallizes due to the bandgap closure as it melts, after which it shows typical behavior for a disordered ionic liquid.

Published
2019

18. Ab initio model of optical properties of two-temperature warm dense matter

Author

Behunin, R., Dalvit, D., Decca, R., Genet, C., Jung, I., Lambrecht, A., Liscio, A., López, D., Reynaud, S., Schnoering, G., Voisin, G., Zeng, Y., Holst, B., Recoules, V., Mazevet, S., Torrent, M., Ng, A., Chen, Z., Kirkwood, S., Sametoglu, V., Reid, M., Tsui, Y., DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire pour l'utilisation des lasers intenses (LULI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Department of Physics and Astronomy [Columbia] (Mizzou Physics), University of Missouri [Columbia] (Mizzou), University of Missouri System-University of Missouri System, University of Alberta, Université d'Ottawa [Ontario] (uOttawa), University of Northern British Columbia [Prince George] (UNBC), ANR-09-BLAN-0206,OEDYP(2009), Service des Maladies infectieuses et tropicales [CHU Limoges], CHU Limoges, Universität Erlangen-Nürnberg - Erlangen, Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute of Organic Synthesis and Photoreactivity (ISOF), Consiglio Nazionale delle Ricerche [Roma] (CNR), CETIAT, Centre Technique des Industries Aérauliques et Thermiques, Institut de Science et d'ingénierie supramoléculaires (ISIS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institut d'électronique fondamentale (IEF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institute of Experimental Physics [Graz], Graz University of Technology [Graz] (TU Graz), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), University of Quebec (INRS-EMT), Swedish Institute of Space Physics [Kiruna] (IRF), CTVR/Stokes Institute, Engineering Research Building, and University of Limerick (UL)

Subjects
Materials science, PACS number(s): 52.50.Jm, 52.27.Gr, 71.15.−m, 72.80.−r, Ab initio, FOS: Physical sciences, Physics::Optics, Electron, 01 natural sciences, Molecular physics, 010305 fluids & plasmas, law.invention, Ion, law, 0103 physical sciences, 010306 general physics, ComputingMilieux_MISCELLANEOUS, [PHYS]Physics [physics], Computational Physics (physics.comp-ph), Warm dense matter, Condensed Matter Physics, Laser, Physics - Plasma Physics, Electronic, Optical and Magnetic Materials, Plasma Physics (physics.plasm-ph), Femtosecond, Density functional theory, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Ultrashort pulse, Physics - Computational Physics
Abstract

International audience; We present a model to describe thermophysical and optical properties of two-temperature systems consisted ofheated electrons and cold ions in a solid lattice that occur during ultrafast heating experiments. Our model is basedon ab initio simulations within the framework of density functional theory. The optical properties are obtainedby evaluating the Kubo-Greenwood formula. By applying the material parameters of our ab initio model to atwo-temperature model we are able to describe the temperature relaxation process of femtosecond-laser-heatedgold and its optical properties within the same theoretical framework. Recent time-resolved measurements ofoptical properties of ultrafast heated gold revealed the dynamics of the interaction between femtosecond laserpulses and solid state matter. Different scenarios obtained from simulations of our study are compared withexperimental data [Chen, Holst, Kirkwood, Sametoglu, Reid, Tsui, Recoules, and Ng, Phys. Rev. Lett. 110,135001 (2013)]

Published
2018
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19. A microsecond time resolved x-ray absorption near edge structure synchrotron study of phase transitions in Fe undergoing ramp heating at high pressure.

Author

Marini, C., Occelli, F., Mathon, O., Torchio, R., Recoules, V., Pascarelli, S., and Loubeyre, P.

Subjects
X-ray absorption near edge structure, X-ray absorption, SYNCHROTRON radiation, PHASE transitions, IRON, COMPUTER simulation
Abstract

We report a microsecond time-resolved x-ray absorption near edge structure study using synchrotron radiation to dynamically detect structural phase transitions in Fe undergoing rapid heating along a quasi-isochoric path. Within a few ms, we observed two structural phase transitions, which transform the ambient bcc phase of Fe into the fcc phase, and then into the liquid phase. This example illustrates the opportunities offered by energy dispersive x-ray absorption spectroscopy in the study of matter under extreme dynamic conditions. Advanced simulations are compared to these data. [ABSTRACT FROM AUTHOR]

Published
2014
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24. Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics

Author

Williams, Gareth O., Künzel, S., Daboussi, S., Iwan, B., Gonzalez, A.I., Boutu, W., Hilbert, V., Zastrau, U., Lee, H.J., Nagler, B., Granados, E., Galtier, E, Heimann, P., Barbrel, B., Dovillaire, G., Lee, R.W., Dunn, J., Recoules, V., Blancard, C., Renaudin, P., Varga, A.G. de la, Velarde Mayol, Pedro, Audebert, P., Merdji, H., Zeitoun, Philippe, Fajardo, M., Williams, Gareth O., Künzel, S., Daboussi, S., Iwan, B., Gonzalez, A.I., Boutu, W., Hilbert, V., Zastrau, U., Lee, H.J., Nagler, B., Granados, E., Galtier, E, Heimann, P., Barbrel, B., Dovillaire, G., Lee, R.W., Dunn, J., Recoules, V., Blancard, C., Renaudin, P., Varga, A.G. de la, Velarde Mayol, Pedro, Audebert, P., Merdji, H., Zeitoun, Philippe, and Fajardo, M.

Abstract

We present measurements of photon absorption by free electrons as a solid is transformed to plasma. A femtosecond x-ray free-electron laser is used to heat a solid, which separates the electron and ion heating time scales. The changes in absorption are measured with an independent probe pulse created through high-order-harmonic generation. We find an increase in electron temperature to have a relatively small impact on absorption, contrary to several predictions, whereas ion heating increases absorption. We compare the data to current theoretical and numerical approaches and find that a smoother electronic structure yields a better fit to the data, suggestive of a temperature-dependent electronic structure in warm dense matter.

Published
2018

26. Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics

Author

Williams, Gareth O., primary, Künzel, S., additional, Daboussi, S., additional, Iwan, B., additional, Gonzalez, A. I., additional, Boutu, W., additional, Hilbert, V., additional, Zastrau, U., additional, Lee, H. J., additional, Nagler, B., additional, Granados, E., additional, Galtier, E., additional, Heimann, P., additional, Barbrel, B., additional, Dovillaire, G., additional, Lee, R. W., additional, Dunn, J., additional, Recoules, V., additional, Blancard, C., additional, Renaudin, P., additional, de la Varga, A. G., additional, Velarde, P., additional, Audebert, P., additional, Merdji, H., additional, Zeitoun, Ph., additional, and Fajardo, M., additional

Published
2018
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35. Time evolution of electron structure in femtosecond heated warm dense molybdenum

Author

Dorchies, F., primary, Recoules, V., additional, Bouchet, J., additional, Fourment, C., additional, Leguay, P. M., additional, Cho, B. I., additional, Engelhorn, K., additional, Nakatsutsumi, M., additional, Ozkan, C., additional, Tschentscher, T., additional, Harmand, M., additional, Toleikis, S., additional, Störmer, M., additional, Galtier, E., additional, Lee, H. J., additional, Nagler, B., additional, Heimann, P. A., additional, and Gaudin, J., additional

Published
2015
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37. X-ray absorption spectroscopy of iron at multimegabar pressures in laser shock experiments

Author

Harmand, M., primary, Ravasio, A., additional, Mazevet, S., additional, Bouchet, J., additional, Denoeud, A., additional, Dorchies, F., additional, Feng, Y., additional, Fourment, C., additional, Galtier, E., additional, Gaudin, J., additional, Guyot, F., additional, Kodama, R., additional, Koenig, M., additional, Lee, H. J., additional, Miyanishi, K., additional, Morard, G., additional, Musella, R., additional, Nagler, B., additional, Nakatsutsumi, M., additional, Ozaki, N., additional, Recoules, V., additional, Toleikis, S., additional, Vinci, T., additional, Zastrau, U., additional, Zhu, D., additional, and Benuzzi-Mounaix, A., additional

Published
2015
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39. K-edge Absorption spectra in Warm Dense Matter

Author

Peyrusse, O., Mazevet, S., Recoules, V., fabien dorchies, Harmand, M., Levy, A., Fuchs, J., Mancic, A., Nakatsutsumi, M., Renaudin, P., Audebert, P., Fournier, K. B., Centre d'Etudes Lasers Intenses et Applications (CELIA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Deutsches Elektronen-Synchrotron [Zeuthen] (DESY), Helmholtz-Gemeinschaft = Helmholtz Association, ONERA - The French Aerospace Lab [Châtillon], ONERA-Université Paris Saclay (COmUE), Institut of Applied Physics (IAP), Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], Laboratoire pour l'utilisation des lasers intenses (LULI), Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Groupe d'Etude de la Matière Condensée (GEMAC), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), and Dorchies, Fabien

Subjects
[PHYS]Physics [physics], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract

International audience; no abstract

Published
2009

40. Ab initio and experimental studies of glow-discharge polymer used in Laser MégaJoule capsules.

Author

Colin-Lalu, P., Recoules, V., Salin, G., and Huser, G.

Subjects
INERTIAL confinement fusion, CORONA discharge, GLOW discharges, MOLECULAR dynamics, EQUATIONS of state
Abstract

The equations of state tables used in Inertial Confinement Fusion Capsule design tools are highly dependent on the cold curve in the multimegabar pressure range. Original ab initio molecular dynamic simulations were performed to get accurate cold curves of glow-discharge polymer (GDP) plastics. Furthermore the effect of oxygen absorption by GDP structure is studied on the cold curve, as well as its impact on the Hugoniot curves. Results are compared with the Hugoniot experimental data obtained in a recent experiment at the LULI2000 laser facility in France. This study leads to improve the equation of states knowledge of ablator materials, which is of primary importance for NIF and LMJ experiments. [ABSTRACT FROM AUTHOR]

Published
2017
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47. Ultrafast Short-Range Disordering of Femtosecond-Laser-Heated Warm Dense Aluminum

Author

Leguay, P. M., primary, Lévy, A., additional, Chimier, B., additional, Deneuville, F., additional, Descamps, D., additional, Fourment, C., additional, Goyon, C., additional, Hulin, S., additional, Petit, S., additional, Peyrusse, O., additional, Santos, J. J., additional, Combis, P., additional, Holst, B., additional, Recoules, V., additional, Renaudin, P., additional, Videau, L., additional, and Dorchies, F., additional

Published
2013
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