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85 results on '"Attophysique (ATTO)"'

51. Interferometric control of the ellipticity of a femtosecond extreme ultraviolet source

Author: Vincent Gruson, F. Lepetit, Thierry Ruchon, Pascal Salières, Thierry Auguste, L. Barreau, Bertrand Carré, J.-F. Hergott, Sébastien J. Weber, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Scientifique [Québec] (INRS), Nano-Optique et Nanomatériaux pour l'optique (CEMES-NeO), Centre d'élaboration de matériaux et d'études structurales (CEMES), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT-FR 2599), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Serveurs Laser (SLIC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Extreme ultraviolet lithography, Physics::Optics, 02 engineering and technology, 01 natural sciences, law.invention, 010309 optics, Optics, law, 0103 physical sciences, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Circular polarization, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Linear polarization, business.industry, Statistical and Nonlinear Physics, 021001 nanoscience & nanotechnology, Polarization (waves), Laser, Atomic and Molecular Physics, and Optics, Extreme ultraviolet, Femtosecond, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Astrophysics::Earth and Planetary Astrophysics, 0210 nano-technology, business, Ultrashort pulse
Abstract: International audience; A method for ultrafast ellipticity modulation of femtosecond intense lasers is introduced and demonstrated. The method is based on the coherent superimposition of two linearly polarized visible/infrared (Vis-IR) laser beams with orthogonal polarizations. Tuning their delay by a quarter of the wavelength, i.e., a few hundred nanometers, achieves the same function as the rotation of a quarter-wave plate by 45°, switching the polarization from linear to circular. We demonstrate the portability of this method to high-intensity processes by upconverting a femtosecond Vis-IR laser beam to the extreme ultraviolet (EUV) spectral range through high-harmonic generation. These results open the way to lock-in detection of small absorption chiroptical signals in the EUV spectral range, including pump probe signals.
Published: 2018
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52. Coulomb explosion imaging of CH3I and CH2CII photodissociation dynamics

Author: Barbara Cunha de Miranda, Per Johnsson, Romain Géneaux, Stuart R. Mackenzie, I. Ismail, Hansjochen Köckert, David M. P. Holland, Dimitrios Rompotis, Marie Géléoc, Jérôme Palaudoux, Loic Journel, Jonathan G. Underwood, Farzaneh Ziaee, Jan Lahl, Robert Mason, Kasra Amini, Mark Brouard, Gildas Goldsztejn, Artem Rudenko, Stefan Düsterer, Sylvain Maclot, Maria Novella Piancastelli, Arnaud Rouzée, Thierry Ruchon, Daniel Rolles, Michael Burt, Jongmin Lee, Rebecca Boll, Oksana Travnikova, Andrey S. Mereshchenko, Joss Wiese, Sebastian Trippel, Marc Simon, Francis Penent, Felix Allum, Felix Brauße, Bastian Manschwetus, Simone Techert, Evgeny Savelyev, Tatiana Marchenko, Henrik Stapelfeldt, Renaud Guillemin, Nora Schirmel, Cédric Bomme, Benjamin Erk, Alexander S. Gentleman, Claire Vallance, Pavel K. Olshin, Sadia Bari, Jochen Küpper, University of Oxford, Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Saint Petersburg State Polytechnical University (SPSPU), KVI Atomic and Molecular Physics (KVI), University of Groningen [Groningen], Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Microbiology Laboratory, Middlemore Hospital, Laboratoire des collisions atomiques et moléculaires (LCAM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Department of Physics, Lund Institute of Technology, Lund University [Lund]-Lund University [Lund], Lund University [Lund], 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), Physical and Theoretical Chemistry Laboratory, Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Kansas State University, Georg-August-University = Georg-August-Universität Göttingen, Department of Physics and Astronomy [UCL London], University College of London [London] (UCL), Center for Free-Electron Laser Science (CFEL), ANR-16-CE30-0001,ATTOMEMUCHO,Dynamique électronique attoseconde dans les molécules organiques isolées par la spectroscopie 'core-hole clock'(2016), University of Oxford [Oxford], Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Georg-August-University [Göttingen], Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Caen Normandie (UNICAEN), and Normandie Université (NU)
Subjects: Atom and Molecular Physics and Optics, Imaging spectrometer, General Physics and Astronomy, 02 engineering and technology, Physical Chemistry, 01 natural sciences, Molecular physics, Mass spectrometry imaging, Ion, 0103 physical sciences, Molecule, ddc:530, Physical and Theoretical Chemistry, 010306 general physics, ComputingMilieux_MISCELLANEOUS, Fysikalisk kemi, Physics, Coupling, Range (particle radiation), Photodissociation, Coulomb explosion, 021001 nanoscience & nanotechnology, 3. Good health, Atom- och molekylfysik och optik, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], 0210 nano-technology
Abstract: The journal of chemical physics 149(20), 204313 (2018). doi:10.1063/1.5041381, The photodissociation dynamics of CH$_3$I and CH$_2$ClI at 272 nm were investigated by time-resolved Coulomb explosion imaging, with an intense non-resonant 815 nm probe pulse. Fragment ion momenta over a wide m/z range were recorded simultaneously by coupling a velocity map imaging spectrometer with a pixel imaging mass spectrometry camera. For both molecules, delay-dependent pump-probe features were assigned to ultraviolet-induced carbon-iodine bond cleavage followed by Coulomb explosion. Multi-mass imaging also allowed the sequential cleavage of both carbon-halogen bonds in CH$_2$ClI to be investigated. Furthermore, delay-dependent relative fragment momenta of a pair of ions were directly determined using recoil-frame covariance analysis. These results are complementary to conventional velocity map imaging experiments and demonstrate the application of time-resolved Coulomb explosion imaging to photoinduced real-time molecular motion., Published by American Institute of Physics, Melville, NY
Published: 2018
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53. Tunable mid-infrared source of light carrying orbital angular momentum in the femtosecond regime

Author: Pierre Agostini, Yu Hang Lai, Hyunwook Park, Cosmin I. Blaga, Bradford K. Talbert, A. Camper, Hiroyuki Kageyama, Louis F. DiMauro, Sha Li, Thierry Ruchon, Ohio State University [Columbus] (OSU), Department of Chemistry, School of Science, The University of Tokyo (UTokyo), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Angular momentum, business.industry, Aperture, Physics::Optics, 7. Clean energy, 01 natural sciences, Optical parametric amplifier, Atomic and Molecular Physics, and Optics, 010309 optics, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], Wavelength, Optics, 0103 physical sciences, Angular momentum of light, Femtosecond, Optoelectronics, Orbital angular momentum multiplexing, Orbital angular momentum of light, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], 010306 general physics, business, ComputingMilieux_MISCELLANEOUS
Abstract: We report on a tunable intense femtosecond mid-infrared (mid-IR) light source carrying orbital angular momentum (OAM). Our setup is based on an optical parametric amplification system with an 800 nm pump shaped with a spiral phase plate. We confirm the anisotropic OAM transfer from the pump to the idler through stimulated difference frequency generation by measuring the diffraction patterns of a triangular aperture illuminated by the signal, pump, and idler beams. The tunability of the setup is demonstrated by performing measurements at 3.0 and 3.6 μm idler wavelengths. This result provides a robust method of controlling OAM in strong field physics and designing secondary sources carrying OAM in the extreme ultraviolet spectral range through high-order harmonics generation.
Published: 2017
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54. Attosecond metrology: Optical waveform reconstruction

Author: Salières, Pascal, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI]Engineering Sciences [physics], Physics::Optics
Abstract: International audience; The direct measurement of few-cycle optical waveforms with arbitrary polarization and weak intensity is now made possible thanks to extreme ultraviolet interferometry with isolated attosecond pulses.
Published: 2017
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55. Optical waveform reconstruction

Author: Pascal Salières, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, [PHYS]Physics [physics], business.industry, Attosecond, Physics::Optics, 02 engineering and technology, 021001 nanoscience & nanotechnology, Polarization (waves), 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Metrology, 010309 optics, Interferometry, Optics, Extreme ultraviolet, 0103 physical sciences, Computer Science::Programming Languages, Optoelectronics, Waveform, 0210 nano-technology, business, Optical metrology
Abstract: International audience; The direct measurement of few-cycle optical waveforms with arbitrary polarization and weak intensity is now madepossible thanks to extreme ultraviolet interferometry with isolated attosecond pulses.
Published: 2017
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56. Precise Access to the Molecular-Frame Complex Recombination Dipole through High-Harmonic Spectroscopy

Author: Pascal Salières, Louis F. DiMauro, Stephen B. Schoun, Pierre Agostini, Robert R. Lucchese, A. Camper, Ohio State University [Columbus] (OSU), Department of Physics, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry, Texas University, and Texas University
Subjects: General Physics, General Physics and Astronomy, Photoionization, 01 natural sciences, Mathematical Sciences, law.invention, Engineering, law, 0103 physical sciences, Physics::Atomic Physics, 010306 general physics, Spectroscopy, Radiant intensity, Group delay and phase delay, Physics, [PHYS]Physics [physics], 010304 chemical physics, business.industry, Laser, Moment (mathematics), Dipole, Physical Sciences, Harmonic, Optoelectronics, Atomic physics, business
Abstract: © 2017 American Physical Society. We report on spectral intensity and group delay measurements of the highest-occupied molecular-orbital (HOMO) recombination dipole moment of N2 in the molecular-frame using high harmonic spectroscopy. We take advantage of the long-wavelength 1.3 μm driving laser to isolate the HOMO in the near threshold region, 19-67 eV. The precision of our group delay measurements reveals previously unseen angle-resolved spectral features associated with autoionizing resonances, and allows quantitative comparison with cutting-edge correlated 8-channel photoionization dipole moment calculations.
Published: 2017
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57. Dynamic wavefront rotation in the attosecond lighthouse

Author: Chunmei Zhang, Paul B. Corkum, Emeric Balogh, Fabien Quéré, J.-F. Hergott, Thierry Ruchon, Chang Hee Nam, Kyung Taec Kim, Center for Relativistic Laser Science, Institute for Basic Science (IBS), Joint Attosecond Science Laboratory, University of Ottawa and National Research Council, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Serveurs Laser (SLIC), and Physique à Haute Intensité (PHI)
Subjects: Diffraction, Wavefront, Physics, [PHYS.PHYS]Physics [physics]/Physics [physics], business.industry, Angular distance, Attosecond, Bandwidth (signal processing), Physics::Optics, Laser, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, 010309 optics, Optics, law, Ionization, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Physics::Atomic Physics, 010306 general physics, business, Attosecond pulse
Abstract: Attosecond pulses propagating in different directions, generated in a rotating wavefront of a driving laser field, can provide a source of multiple isolated attosecond pulses. Clear spatial separation of the attosecond pulses is attained if the divergence of the individual attosecond pulse is smaller than their angular separation, which is limited by the bandwidth of the driving laser pulse. Here we demonstrate both experimentally and numerically that an additional wavefront rotation is imposed during the propagation of the driving laser pulse in a highly ionizing medium. This dynamic wavefront rotation enables the generation of the isolated attosecond pulse even in the case when the conditions derived from a linear diffraction theory do not permit the angular separation. The described nonlinear phenomenon has its roots in the half-cycle ionization events, and may open up new ways to study strong field processes in highly ionizing media. (C) 2017 Optical Society of America
Published: 2017
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58. Phase-Resolved Two-Dimensional Spectroscopy of Electronic Wavepackets by Laser-Induced XUV Free Induction Decay

Author: Samuel Beaulieu, Yann Mairesse, L. Barreau, Dominique Descamps, Antoine Comby, Stéphane Petit, Romain Géneaux, François Légaré, Etienne Bloch, Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Scientifique [Québec] (INRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, [PHYS]Physics [physics], Atomic Physics (physics.atom-ph), Dephasing, Wave packet, FOS: Physical sciences, Laser, 7. Clean energy, 01 natural sciences, 3. Good health, law.invention, Physics - Atomic Physics, 010309 optics, Free induction decay, Amplitude, law, Extreme ultraviolet, 0103 physical sciences, Heterodyne detection, Atomic physics, 010306 general physics, Spectroscopy
Abstract: We present a novel time- and phase-resolved, background-free scheme to study the extreme ultraviolet dipole emission of a bound electronic wavepacket, without the use of any extreme ultraviolet exciting pulse. Using multiphoton transitions, we populate a superposition of quantum states which coherently emit extreme ultraviolet radiation through free induction decay. This emission is probed and controlled, both in amplitude and phase, by a time-delayed infrared femtosecond pulse. We directly measure the laser-induced dephasing of the emission by using a simple heterodyne detection scheme based on two-source interferometry. This technique provides rich information about the interplay between the laser field and the Coulombic potential on the excited electron dynamics. Its background-free nature enables us to use a large range of gas pressures and to reveal the influence of collisions in the relaxation process., Comment: In press, PRA Rapid Communications
Published: 2017
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59. Tunable orbital angular momentum in high-harmonic generation

Author: A. Camper, Thierry Ruchon, Fabio Frassetto, Luca Poletto, Ganesh Adhikary, Guillaume Dovillaire, C Chappuis, Carlo Spezzani, Louis F. DiMauro, Paolo Miotti, Barbara Ressel, Matija Stupar, David Gauthier, Riccardo Cucini, G. De Ninno, P. Rebernik Ribič, Romain Géneaux, Elettra Sincrotrone Trieste, Laboratory of Quantum Optics, University of Nova Gorica, Ohio State University [Columbus] (OSU), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Imagine Optic, AFOP, CNR Inst Photon & Nanotechnol, Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), ANR-14-CE32-0010,Xstase,Étude du moment angulaire de faisceaux lumineux XUV: synthèse et transferts(2014), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Genetics and Molecular Biology (all), Angular momentum, Photon, Science, General Physics and Astronomy, FOS: Physical sciences, Physics::Optics, angular momentum, 01 natural sciences, Biochemistry, Article, General Biochemistry, Genetics and Molecular Biology, 010309 optics, high-order laser harmonics, Physics and Astronomy (all), Optics, 0103 physical sciences, High harmonic generation, Light beam, 010306 general physics, Physics, [PHYS]Physics [physics], Multidisciplinary, business.industry, Chemistry (all), Optical physics, General Chemistry, Dichroism, Femtosecond, Biochemistry, Genetics and Molecular Biology (all), business, Optical vortex, Optics (physics.optics), Physics - Optics
Abstract: Optical vortices are currently one of the most intensively studied topics in optics. These light beams, which carry orbital angular momentum (OAM), have been successfully utilized in the visible and infrared in a wide variety of applications. Moving to shorter wavelengths may open up completely new research directions in the areas of optical physics and material characterization. Here, we report on the generation of extreme-ultraviolet optical vortices with femtosecond duration carrying a controllable amount of OAM. From a basic physics viewpoint, our results help to resolve key questions such as the conservation of angular momentum in highly nonlinear light–matter interactions, and the disentanglement and independent control of the intrinsic and extrinsic components of the photon's angular momentum at short-wavelengths. The methods developed here will allow testing some of the recently proposed concepts such as OAM-induced dichroism, magnetic switching in organic molecules and violation of dipolar selection rules in atoms., The controlled generation of extreme-ultraviolet beams with controllable topological charge has not been demonstrated. Here, Gauthier et al. report on the generation of extreme-ultraviolet optical vortices with femtosecond duration carrying a controllable amount of orbital angular momentum.
Published: 2017
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60. Elastoplasmonic interaction in metal-insulator-metal localized surface plasmon systems

Author: Abdelali Mrabti, Pierre-Michel Adam, Abdellatif Akjouj, Gaëtan Lévêque, Rana Nicolas, Thomas Maurer, Yan Pennec, Bahram Djafari-Rouhani, 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), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Nanotechnologie et d'Instrumentation Optique (LNIO), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), and Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Coupling, Materials science, business.industry, Surface plasmon, Physics::Optics, 02 engineering and technology, Dielectric, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Surface plasmon polariton, [INFO.INFO-MO]Computer Science [cs]/Modeling and Simulation, 0104 chemical sciences, Wavelength, Optics, Deformation (engineering), [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, business, Plasmon, Localized surface plasmon
Abstract: International audience; We investigate theoretically and numerically the coupling between elastic and localized surface plasmon modes in a system of gold nanocylinders separated from a thin gold film by a dielectric spacer of few nanometers thickness. That system supports plasmon modes confined in between the bottom of the nanocylinder and the top of the gold film, which arise from the formation of interference patterns by short-wavelength metal-insulator-metal propagating plasmon. First, we present the plasmonic properties of the system though computer-simulated extinction spectra and field maps associated to the different optical modes. Next, a simple analytical model is introduced, which allows to correctly reproduce the shape and wavelengths of the plasmon modes. This model is used to investigate the efficiency of the coupling between an elastic deformation and the plasmonic modes. In the last part of the paper, we present the full numerical simulations of the elastic properties of the system, and then compute the acousto-plasmonic coupling between the different plasmon modes and five acoustic modes of very different shape. The efficiency of the coupling is assessed first by evaluating the modulation of the resonance wavelength, which allows comparison with the analytical model, and finally in term of time-modulation of the transmission spectra on the full visible range, computed for realistic values of the deformation of the nanoparticle.
Published: 2016
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61. Origin of ellipticity of high-order harmonics generated by a two-color laser field in the cross-polarized configuration

Author: Pascal Salières, A. Andreev, Guillaume Lambert, Boris Vodungbo, S. Stremoukhov, Benoît Mahieu, Faculty of Physics [MSU, Moscow], Lomonosov Moscow State University (MSU), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Sorbonne Université (SU), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS]Physics [physics], Physics, education.field_of_study, Angular momentum, Field (physics), Population, Elliptical polarization, Laser, 01 natural sciences, law.invention, 010309 optics, law, Harmonics, 0103 physical sciences, Harmonic, Degree of polarization, Atomic physics, 010306 general physics, education
Abstract: International audience; Recently several techniques demonstrated the production of elliptically polarized high harmonics. One of these techniques consists of the interaction in a noble gas of two-color laser beams having orthogonal linear polarizations. Here we present the theoretical explanation of such a result observed in Lambert et al. [Nat. Commun. 6, 6167 (2015)]. Numerical calculations based on the nonperturbative light-atom interaction theory reproduce well the experimental data. The degree of polarization is analyzed for different harmonic orders and found to be high. With the help of a simplified theoretical model it is shown that the degree of harmonic ellipticity depends mainly on the population of atomic state sublevels with different angular momentum projections.
Published: 2016
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62. Determination of accurate electron chiral asymmetries in fenchone and camphor in the VUV range: sensitivity to isomerism and enantiomeric purity

Author: Uwe J. Meierhenrich, Gustavo A. Garcia, Ivan Powis, Iuliia Myrgorodska, Vincent Wanie, Romain Géneaux, Samuel Beaulieu, Lipsa Nag, Valérie Blanchet, Laurent Nahon, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Nice (ICN), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), 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), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), School of Chemistry, The University of Nottingham, University Park, Nottingham, NG7 2RD, UK., School of Chemistry, The University of Nottingham, University Park, Nottingham, NG7 2RD, UK. Code (UMR, EA, ...), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), and Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS]Physics [physics], Spectrometer, Chemistry, Analytical chemistry, General Physics and Astronomy, Synchrotron radiation, Photoionization, Electron, Photoelectric effect, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Ion, 0103 physical sciences, Physical and Theoretical Chemistry, Enantiomer, 010306 general physics, Enantiomeric excess
Abstract: International audience; Photoelectron circular dichroism (PECD) manifests itself as an intense forward/backward asymmetry in the angular distribution of photoelectrons produced from randomly-oriented enantiomers by photoionization with circularly-polarized light (CPL). As a sensitive probe of both photoionization dynamics and of the chiral molecular potential, PECD attracts much interest especially with the recent performance of related experiments with visible and VUV laser sources. Here we report, by use of quasi-perfect CPL VUV synchrotron radiation and using a double imaging photoelectron/photoion coincidence (i2PEPICO) spectrometer, new and very accurate values of the corresponding asymmetries on showcase chiral isomers: camphor and fenchone. These data have additionally been normalized to the absolute enantiopurity of the sample as measured by a chromatographic technique. They can therefore be used as benchmarking data for new PECD experiments, as well as for theoretical models. In particular we found, especially for the outermost orbital of both molecules, a good agreement with CMS-Xα PECD modeling over the whole VUV range. We also report a spectacular sensitivity of PECD to isomerism for slow electrons, showing large and opposite asymmetries when comparing R-camphor to R-fenchone (respectively −10% and +16% around 10 eV). In the course of this study, we could also assess the analytical potential of PECD. Indeed, the accuracy of the data we provide are such that limited departure from perfect enantiopurity in the sample we purchased could be detected and estimated in excellent agreement with the analysis performed in parallel via a chromatographic technique, establishing a new standard of accuracy, in the ±1% range, for enantiomeric excess measurement via PECD. The i2PEPICO technique allows correlating PECD measurements to specific parent ion masses, which would allow its application to analysis of complex mixtures
Published: 2016
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63. Impact of noise in holography with extended references in the low signal regime

Author: R. Cassin, Fenglin Wang, M. Ducousso, Milutin Kovacev, Hamed Merdji, J. Samaan, X. Ge, Bianca Iwan, Willem Boutu, A. I. Gonzalez, D. Gauthier, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Leibniz Universität Hannover [Hannover] (LUH), and Leibniz Universität Hannover=Leibniz University Hannover
Subjects: Diffraction, Physics, [PHYS]Physics [physics], business.industry, Holography, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Image processing, Iterative reconstruction, 01 natural sciences, Signal, Noise (electronics), Atomic and Molecular Physics, and Optics, law.invention, 010309 optics, Optics, Software, law, 0103 physical sciences, Harmonic, 010306 general physics, business
Abstract: International audience; Signal-to-noise ratio is a key factor in lensless imaging, particularly for low diffraction signal experiments in the single shot regime.We present our recent study of the noise impact on holography with extended references. Experimental data have been measured in single shot acquisition using an intense coherent soft X-ray high harmonic source. The impact of hardware and software noise under various detection conditions is discussed. A final comparison between single shot and multi-shot regimes is given.
Published: 2016
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64. Attosecond lighthouses in gases: A theoretical and numerical study

Author: Thierry Ruchon, Fabien Quéré, O. Gobert, Thierry Auguste, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Serveurs Laser (SLIC), and Physique à Haute Intensité (PHI)
Subjects: Physics, [PHYS]Physics [physics], Field (physics), business.industry, Attosecond, Laser, 7. Clean energy, 01 natural sciences, law.invention, 010309 optics, Wavelength, Optics, law, Robustness (computer science), 0103 physical sciences, Laser pulse duration, Physics::Atomic Physics, Current (fluid), 010306 general physics, business, Phase matching
Abstract: International audience; We present an extensive theoretical and numerical study of the attosecond lighthouse effect in gases. We study how this scheme impacts the spatiotemporal structure of the driving laser field all along the generation medium, and show that this can modify the phase matching relation governing high-harmonic generation (HHG) in gases. We then present a set of numerical simulations performed to test the robustness of the effect against variations of HHG parameters, and to identify possible solutions for relaxing the constraint on the driving laser pulse duration. We thus demonstrate that the lighthouse effect can actually be achieved with laser pulses consisting of up to ∼8 optical periods available from current lasers without postcompression, for instance by using an appropriate combination of 800− and 1600-nm wavelength fields.
Published: 2016
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65. Molecular frame photoemission by a comb of elliptical high-order harmonics: a sensitive probe of both photodynamics and harmonic complete polarization state

Author: L. Barreau, Robert R. Lucchese, Thierry Ruchon, Vincent Gruson, J. C. Houver, Pascal Salières, Danielle Dowek, Sébastien J. Weber, J.-F. Hergott, K. Veyrinas, Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Serveurs Laser (SLIC), Laboratoire des collisions atomiques et moléculaires (LCAM), Department of Chemistry, Texas University, and Texas University
Subjects: Attosecond, 02 engineering and technology, Photoionization, Elliptical polarization, 01 natural sciences, symbols.namesake, Optics, 0103 physical sciences, Ultrafast imaging of photochemical dynamics, Stokes parameters, Physical and Theoretical Chemistry, 010306 general physics, Physics, [PHYS.PHYS]Physics [physics]/Physics [physics], business.industry, Computer Science::Information Retrieval, 021001 nanoscience & nanotechnology, Polarization (waves), symbols, Degree of polarization, Atomic physics, 0210 nano-technology, business, Ultrashort pulse, Light field
Abstract: Due to the intimate anisotropic interaction between an XUV light field and a molecule resulting in photoionization (PI), molecular frame photoelectron angular distributions (MFPADs) are most sensitive probes of both electronic/nuclear dynamics and the polarization state of the ionizing light field. Consequently, they encode the complex dipole matrix elements describing the dynamics of the PI transition, as well as the three normalized Stokes parameters s1, s2, s3 characterizing the complete polarization state of the light, operating as molecular polarimetry. The remarkable development of advanced light sources delivering attosecond XUV pulses opens the perspective to visualize the primary steps of photochemical dynamics in time-resolved studies, at the natural attosecond to few femtosecond time-scales of electron dynamics and fast nuclear motion. It is thus timely to investigate the feasibility of measurement of MFPADs when PI is induced e.g., by an attosecond pulse train (APT) corresponding to a comb of discrete high-order harmonics. In the work presented here, we report MFPAD studies based on coincident electron-ion 3D momentum imaging in the context of ultrafast molecular dynamics investigated at the PLFA facility (CEA-SLIC), with two perspectives: (i) using APTs generated in atoms/molecules as a source for MFPAD-resolved PI studies, and (ii) taking advantage of molecular polarimetry to perform a complete polarization analysis of the harmonic emission of molecules, a major challenge of high harmonic spectroscopy. Recent results illustrating both aspects are reported for APTs generated in unaligned SF6 molecules by an elliptically polarized infrared driving field. The observed fingerprints of the elliptically polarized harmonics include the first direct determination of the complete s1, s2, s3 Stokes vector, equivalent to (ψ, ε, P), the orientation and the signed ellipticity of the polarization ellipse, and the degree of polarization P. They are compared to so far incomplete results of XUV optical polarimetry. We finally discuss the comparison between the outcomes of photoionization and high harmonic spectroscopy for the description of molecular photodynamics.
Published: 2016
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66. Combined high-harmonic interferometries for vectorial spectroscopy

Author: Frédéric Burgy, Stéphane Petit, A. Ferré, Thierry Ruchon, Dominique Descamps, A. Camper, Valérie Blanchet, Yann Mairesse, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Femto (LCAR), Laboratoire Collisions Agrégats Réactivité (LCAR), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Centre d'Economie et de Sociologie Rurales Appliquées à l'Agriculture et aux Espaces Ruraux (CESAER), Institut National de la Recherche Agronomique (INRA)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), and AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Recherche Agronomique (INRA)
Subjects: Physics, [PHYS.PHYS]Physics [physics]/Physics [physics], business.industry, Physics::Optics, Grating, Laser, Polarization (waves), Atomic and Molecular Physics, and Optics, law.invention, Interferometry, Amplitude, Optics, law, Extreme ultraviolet, Harmonics, business, Diffraction grating
Abstract: International audience; We present a new method to characterize transverse vectorial light produced by high-harmonic generation (HHG). The incoherent sum of the two components of the electric field is measured using a bi-dimensional transient grating while one of the components is simultaneously characterized using two-source interferometry. The combination of these two interferometric setups enables the amplitude and phase measurement of the two vectorial components of the extreme ultraviolet radiation. We demonstrate the potential of this technique in the case of HHG in aligned nitrogen, revealing the vectorial properties of harmonics 9–17 of a Ti:sapphire laser.
Published: 2015
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67. Temporal analysis of fractional revivals of molecular observables following impulsive alignment

Author: C. Cornaggia, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS]Physics [physics], Physics, Parity (physics), Linear molecular geometry, Observable, Molecular axis, 01 natural sciences, Atomic and Molecular Physics, and Optics, 010305 fluids & plasmas, Quantum mechanics, 0103 physical sciences, Rotational spectroscopy, 010306 general physics, Mathematical physics
Abstract: Laser-induced impulsive alignment of symmetric linear molecules leads to time-dependent observables which are analyzed in terms of their spectral components. Signals appear as sums over positive integers $\ensuremath{\ell}$ of periodic components ${A}_{2\ensuremath{\ell}}(t)$ with periods ${\ensuremath{\tau}}_{2\ensuremath{\ell}}={(2\ensuremath{\ell}c{B}_{0})}^{\ensuremath{-}1}$, where ${B}_{0}$ is the rotational constant in wave number units. Within each period ${\ensuremath{\tau}}_{2\ensuremath{\ell}}$, four fractional revivals at times $n{\ensuremath{\tau}}_{2\ensuremath{\ell}}/4$ $(n=0,1,2,3)$ exhibit constant successive phase shifts ${(\ensuremath{-}1)}^{\ensuremath{\ell}+p}\ensuremath{\pi}/2$ depending on the even-odd parity $(p=0,1)$ of the initial rotational states. This analysis gives a comprehensive account of the so-called high-order revivals usually discussed in terms of fractional revivals within the period ${\ensuremath{\tau}}_{2}$ of the average value $\ensuremath{\langle}{cos}_{\ensuremath{\vartheta}}^{2}\ensuremath{\rangle}(t)$ of ${cos}^{2}(\ensuremath{\vartheta})$, where $\ensuremath{\vartheta}$ is the angle between the molecular axis and the alignment direction. These considerations are illustrated by experiments and numerical calculations of laser-induced impulsive alignment and tunnel ionization of ${\text{CO}}_{2}$ molecules for which calculated ionization yields of fixed-in-space molecules are available.
Published: 2015
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68. A zero dead-time multi-particle time and position sensitive detector based on correlation between brightness and amplitude

Author: D. Bech, J.-P. Van Roy, Marie Géléoc, Sébastien J. Weber, A Huetz, Xavier Urbain, Y. J. Picard, Institut de la matière condensée et des nanosciences / Institute of Condensed Matter and Nanosciences (IMCN), Université Catholique de Louvain = Catholic University of Louvain (UCL), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires d'Orsay (ISMO), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, CMOS sensor, Brightness, Microchannel, [PHYS.PHYS]Physics [physics]/Physics [physics], business.industry, Detector, Image sensors, 02 engineering and technology, Dead time, Position sensitive detectors, 021001 nanoscience & nanotechnology, Cameras, 01 natural sciences, Phosphors, Optics, Amplitude, 0103 physical sciences, Waveform, Image sensor, 010306 general physics, 0210 nano-technology, business, Instrumentation
Abstract: International audience; A new multi-particle time and position sensitive detector using only a set of microchannel plates, a waveform digitizer, a phosphor screen, and a CMOS camera is described. The assignment of the timing information, as taken from the microchannel plates by fast digitizing, to the positions, as recorded by the camera, is based on the COrrelation between the BRightness of the phosphor screen spots, defined as their integrated intensity and the Amplitude of the electrical signals (COBRA). Tests performed by observing the dissociation of HeH, the fragmentation of H3 into two or three fragments, and the photo-double-ionization of Xenon atoms are presented, which illustrate the performances of the COBRA detection scheme.
Published: 2015
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69. A table-top ultrashort light source in the extreme ultraviolet for circular dichroism experiments

Author: L. Merceron, Romain Géneaux, Valérie Blanchet, Dominique Descamps, Stéphane Petit, Eric Mével, Yann Mairesse, Gustavo A. Garcia, Frédéric Burgy, David Staedter, Laurent Nahon, Antoine Comby, C. Handschin, Thierry Ruchon, A. Ferré, Mathieu Dumergue, Sébastien J. Weber, Baptiste Fabre, Bernard Pons, 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), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Collisions Agrégats Réactivité (LCAR), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Biomolécules Excitées (DICO), Femto (LCAR), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Dynamique et Interactions en phase Condensée (DICO), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC)
Subjects: Physics, [PHYS]Physics [physics], Circular dichroism, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Attosecond, Physics::Optics, Photoionization, Laser, 7. Clean energy, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, law.invention, Pulse (physics), Optics, law, Extreme ultraviolet, Femtosecond, High harmonic generation, business, ultrashort, ComputingMilieux_MISCELLANEOUS
Abstract: International audience; Circular dichroism in the extreme ultraviolet range is broadly used as a sensitive structural probe of matter, from the molecular photoionization of chiral species1, 2, 3 to the magnetic properties of solids4. Extending such techniques to the dynamical regime has been a long-standing quest of solid-state physics and physical chemistry, and was only achieved very recently5 thanks to the development of femtosecond circular extreme ultraviolet sources. Only a few large facilities, such as femtosliced synchrotrons6, 7 or free-electron lasers8, are currently able to produce such pulses. Here, we propose a new compact and accessible alternative solution: resonant high-order harmonic generation of an elliptical laser pulse. We show that this process, based on a simple optical set-up, delivers bright, coherent, ultrashort, quasi-circular pulses in the extreme ultraviolet. We use this source to measure photoelectron circular dichroism on chiral molecules, opening the route to table-top time-resolved femtosecond and attosecond chiroptical experiments.
Published: 2015
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70. Multi-channel electronic and vibrational dynamics in polyatomic resonant high-order harmonic generation

Author: Hadas Soifer, Andrey E. Boguslavskiy, Nirit Dudovich, Dominique Descamps, Barry D. Bruner, Jochen Mikosch, Baptiste Fabre, S. Petit, A. Camper, Yann Mairesse, Frédéric Burgy, Valérie Blanchet, Nikita Fedorov, Thierry Ruchon, Albert Stolow, Michal Dagan, Serguei Patchkovskii, Jérôme Gaudin, G. Geoffroy, A. Ferré, David Staedter, Iain Wilkinson, Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), National Research Council of Canada (NRC), Department of Physics of Complex System, Weizmann Institute of Science [Rehovot, Israël], Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Femto (LCAR), Laboratoire Collisions Agrégats Réactivité (LCAR), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Department of Chemistry, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, Canada KIN 6N5, University of Ottawa [Ottawa], ANR-14-CE32-0014,MISFITS,Imagerie Moléculaire par effet tunnel et recollision en champ fort(2014), European Project: 228334,EC:FP7:INFRA,FP7-INFRASTRUCTURES-2008-1,LASERLAB-EUROPE(2009), European Project: 242334,EC:FP7:SPA,FP7-SPACE-2009-1,MIDAS(2010), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), and Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3)
Subjects: Shape resonance, Atomic Physics (physics.atom-ph), Attosecond, ultraviolet spectroscopy, FOS: Physical sciences, General Physics and Astronomy, Bioinformatics, General Biochemistry, Genetics and Molecular Biology, Article, Physics - Atomic Physics, Physics - Chemical Physics, Ionization, ionization, Physics::Atomic and Molecular Clusters, High harmonic generation, Physics::Atomic Physics, Physics::Chemical Physics, Spectroscopy, Chemical Physics (physics.chem-ph), Physics, polarization, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Multidisciplinary, Polyatomic ion, Resonance, General Chemistry, Molecular vibration, vibration, Atomic physics
Abstract: High-order harmonic generation in polyatomic molecules generally involves multiple channels of ionization. Their relative contribution can be strongly influenced by the presence of resonances, whose assignment remains a major challenge for high-harmonic spectroscopy. Here we present a multi-modal approach for the investigation of unaligned polyatomic molecules, using SF6 as an example. We combine methods from extreme-ultraviolet spectroscopy, above-threshold ionization and attosecond metrology. Fragment-resolved above-threshold ionization measurements reveal that strong-field ionization opens at least three channels. A shape resonance in one of them is found to dominate the signal in the 20–26 eV range. This resonance induces a phase jump in the harmonic emission, a switch in the polarization state and different dynamical responses to molecular vibrations. This study demonstrates a method for extending high-harmonic spectroscopy to polyatomic molecules, where complex attosecond dynamics are expected., Strong-field ionization in molecules is more complex than in atoms with multiple channel dynamics and a coherent superposition of electronic states. Here, Ferré et al. develop multi-modal spectroscopy to measure those dynamics and reveal a resonant to non-resonant high-harmonic generation transition.
Published: 2015
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71. Transverse Electromagnetic Mode Conversion for High-Harmonic Self-Probing Spectroscopy

Author: Antoine Camper, Amélie Ferré, Nan Lin, Emmanouil Skantzakis, David Staedter, Elizabeth English, Bastian Manschwetus, Frédéric Burgy, Stéphane Petit, Dominique Descamps, Thierry Auguste, Olivier Gobert, Bertrand Carré, Pascal Salières, Yann Mairesse, Thierry Ruchon, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), Femto (LCAR), Laboratoire Collisions Agrégats Réactivité (LCAR), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, Serveurs Laser (SLIC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-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), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), and Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Heterodyne, lcsh:Applied optics. Photonics, attosecond, Phase (waves), 7. Clean energy, 01 natural sciences, law.invention, 010309 optics, Optics, law, Ionization, 0103 physical sciences, Radiology, Nuclear Medicine and imaging, 010306 general physics, Instrumentation, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], diffractive optical element, business.industry, lcsh:TA1501-1820, Laser, Atomic and Molecular Physics, and Optics, Lens (optics), Interferometry, Extreme ultraviolet, XUV, two-source interferometry, HHG, business, Fresnel diffraction
Abstract: We report on high-order harmonic (HHG) two-source interferometry (TSI) in molecular gases. We used a 0-$\pi$ phase plate to create two bright spots at the focus of a lens by converting a Gaussian laser beam into a TEM please define $_{01}$ Transverse Electromagnetic Mode. The two bright foci produce two synchronized HHG sources. One of them is used to probe on-going dynamics in the generating medium, while the other serves to heterodyne the signal. The interference of the emissions in the far–field gives access to the phase difference between the two sources. In self–probing HHG phase spectroscopy, one of the two sources is used as a reference while the other one probes some on goin dynamics in the generating medium. We first compute overlap integrals to investigate the mode conversion efficiency. We then establish a clear relation between the laser phase-front curvature and the far-field overlap of the two HHG beams. Both Fresnel diffraction calculations and an experimental lens position scan are used to reveal variations of the phase front inclination in each source. We show that this arrangement offers $\frac{\lambda_{XUV}}{100}$ precision, enabling extremely sensitive phase measurements. Finally, we use this compact setup for TSI and measure phase variations across the molecular alignment revival of nitrogen and in vibrating sulfur hexafluoride. In both gases, the phase variations change sign around the ionization threshold of the investigated molecule.
Published: 2015
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72. Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers

Author: David Garzella, Jean-Philippe Rousseau, Hamed Merdji, Benoît Mahieu, Hugo Dacasa, David Gauthier, Magali Lozano, Philippe Zeitoun, Giovanni De Ninno, Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Elettra Sincrotrone Trieste, Serveurs Laser (SLIC), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Attophysique (ATTO)
Subjects: [PHYS]Physics [physics], Materials science, business.industry, Phase (waves), FOS: Physical sciences, Laser, Spectral phase interferometry for direct electric-field reconstruction, 01 natural sciences, Atomic and Molecular Physics, and Optics, law.invention, 010309 optics, Interferometry, Optics, law, Extreme ultraviolet, Electric field, 0103 physical sciences, Femtosecond, High harmonic generation, Physics::Accelerator Physics, 010306 general physics, business, Physics - Optics, Optics (physics.optics)
Abstract: International audience; We present a setup for complete characterization of femtosecond pulses generated by seeded free-electron lasers (FELs) in the extreme-ultraviolet spectral region. Two delayed and spectrally shifted replicas are produced and used for spectral phase interferometry for direct electric field reconstruction (SPIDER). We show that it can be achieved by a simple arrangement of the seed laser. Temporal shape and phase obtained in FEL simulations are well retrieved by SPIDER reconstructions, allowing to foresee the implementation of this diagnostics tool on existing and future sources. This will be a significant step towards an experimental investigation and control of FEL spectral phase.
Published: 2015
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73. High-harmonic phase spectroscopy using a binary diffractive optical element

Author: Thierry Ruchon, David Gauthier, Pascal Salières, O. Gobert, Thierry Auguste, A. Camper, Bertrand Carré, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Elettra Sincrotrone Trieste, School of Applied Sciences, University of Nova Gorica, Lebe, Caroline, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, [PHYS.PHYS]Physics [physics]/Physics [physics], business.industry, Phase (waves), Atomic and Molecular Physics, and Optics, law.invention, Lens (optics), Dipole, Optics, law, Excited state, Harmonic, Sapphire, High harmonic generation, [PHYS.PHYS] Physics [physics]/Physics [physics], Physics::Atomic Physics, business, Spectroscopy
Abstract: International audience; We report on high-order harmonic generation (HHG) using a Ti:sapphire laser beam phase shaped with a binary diffractive optical element (DOE) to create two spatially separated synchronized HHG sources at the focus of a lens. Using full three-dimensional computations, we show numerically that the harmonic dipole phase is imprinted in the resulting far-field fringe pattern. Using the corresponding experimental arrangement, we measure HHG phase in aligned carbon dioxide. This arrangement is robust, extremely stable, simple to use, and gives highly resolved fringes. It thus opens new perspectives for combined and refined HHG phase measurements in excited samples.
Published: 2014

74. Attosecond evolution of energy- and angle-resolved photoemission spectra in two-color (XUV + IR) ionization of rare gases

Author: J.-F. Hergott, M. Böttcher, E M Staicu Casagrande, Y. J. Picard, F. Lepetit, Bastian Manschwetus, Marie Géléoc, Bertrand Carré, A Huetz, Alfred Maquet, Thierry Ruchon, N. Lin, Richard Taïeb, Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institute for Atmospheric and Climate Science [Zürich] (IAC), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Serveurs Laser (SLIC), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Pierre et Marie Curie - Paris 6 (UPMC), and Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Photon, [PHYS.PHYS]Physics [physics]/Physics [physics], Infrared, Attosecond, Photoionization mode, Photoionization, Astrophysics::Cosmology and Extragalactic Astrophysics, Photoelectric effect, 01 natural sciences, 7. Clean energy, Atomic and Molecular Physics, and Optics, 010309 optics, Ionization, Extreme ultraviolet, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Physics::Atomic Physics, Atomic physics, 010306 general physics, Astrophysics::Galaxy Astrophysics
Abstract: International audience; We have analyzed the angular distributions of the photoelectrons emitted upon photoionization of rare gases by a comb of harmonics in the extreme ultraviolet range, in the presence of a dressing infrared (IR) field with controlled delay ?, stabilized down to about ±60 as. The measurements have been performed with the help of the coincidence momentum imaging technique. We evidence marked differences in the measured angular distributions of the photoelectrons, depending on the number of IR photons exchanged. Joined to a theoretical interpretation, these observations bring new insights into the dynamics of this class of two-color photoionization processes that are a key step towards studying photoionization in the time domain, with attosecond time resolution.
Published: 2014
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75. Applications of ultrafast wavefront rotation in highly nonlinear optics

Author: S. Monchocé, T. J. Hammond, Henri Vincenti, Chunmei Zhang, J. Wheeler, Fabien Quéré, Thierry Auguste, Paul B. Corkum, Jean-François Hergott, Kyung Taec Kim, Thierry Ruchon, Antonin Borot, David M. Villeneuve, Rodrigo Lopez-Martens, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Physique à Haute Intensité (PHI), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Service des Photons, Atomes et Molécules (SPAM), Attophysique (ATTO), Serveurs Laser (SLIC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nonlinear optics, Wavefronts, Attosecond, Time resolved measurement, Physics::Optics, Context (language use), 01 natural sciences, Experimental evidence, law.invention, Ultrashort pulses, 010309 optics, Time resolved studies, Optics, law, Nonlinear optical process, 0103 physical sciences, Light sources, 010306 general physics, Ultrafast lasers, Physics, Wavefront, [PHYS.PHYS]Physics [physics]/Physics [physics], Harmonic generation, business.industry, Attosecond pulse, Condensed Matter Physics, Laser, Atomic and Molecular Physics, and Optics, High harmonic generation, Ultrafast measurements, Femtosecond, Optoelectronics, Spatio-temporal, Photonics, business, Ultrashort pulse
Abstract: This paper provides an overview of ultrafast wavefront rotation of femtosecond laser pulses and its various applications in highly nonlinear optics, focusing on processes that lead to the generation of high-order harmonics and attosecond pulses. In this context, wavefront rotation can be exploited in different ways, to obtain new light sources for time-resolved studies, called 'attosecond lighthouses', to perform time-resolved measurements of nonlinear optical processes, using 'photonic streaking', or to track changes in the carrier-envelope relative phase of femtosecond laser pulses. The basic principles are explained qualitatively from different points of view, the experimental evidence obtained so far is summarized, and the perspectives opened by these effects are discussed. © 2014 IOP Publishing Ltd.
Published: 2014
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76. Self-Probing Spectroscopy of the SF 6 Molecule: A Study of the Spectral Amplitude and Phase of the High Harmonic Emission

Author: Pascal Salières, Bastian Manschwetus, Thierry Ruchon, Roland Guichard, Jérémie Caillat, Richard Taïeb, A. Camper, Thierry Auguste, Marie Géléoc, Nan Lin, Jan Rothhardt, Pierre Breger, Bertrand Carré, Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), 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), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-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 Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], Chemistry, Phase (waves), Interference (wave propagation), 01 natural sciences, 010305 fluids & plasmas, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Amplitude, Distortion, Ionization, 0103 physical sciences, Harmonic, Physics::Atomic and Molecular Clusters, High harmonic generation, Physics::Atomic Physics, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Physical and Theoretical Chemistry, Atomic physics, 010306 general physics, Spectroscopy
Abstract: International audience; We present characterizations of the attosecond pulse train produced in the high harmonic generation (HHG) from SF 6 molecules irradiated by a strong pulsed laser field at 800 nm. At harmonic order 17, we observe a minimum in the amplitude of the emitted spectrum and a corresponding distortion in the phase. Our experimental results are compared to two models: a multicenter interference model focused on the effect of the structure of the SF 6 molecule in HHG and a model focused on the interferences between multiple ionization channels in HHG. We find that the experimental results agree very well with the multiple ionization channels model, illustrating that HHG in molecules can be very complex and that it provides insights of the intramolecular electron dynamics during the interaction process.
Published: 2014
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77. Control and identification of strong field dissociative channels in CO₂⁺ via molecular alignment

Author: Oppermann, M, Weber, Sébastien J., Morales, F, Richter, M, Patchkovskii, S, Csehi, A, Vibók, A, Ivanov, M, Smirnova, O, Marangos, J P, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Departament de Ecologia, Universitat d'Alacant, Centro de Estudios Ambientales del Mediterraneo, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Department of Theoretical Physics, University of Debrecen Egyetem [Debrecen], Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and University of Debrecen
Subjects: [PHYS.PHYS]Physics [physics]/Physics [physics], Physics::Atomic and Molecular Clusters, Physics::Atomic Physics
Abstract: International audience; The dissociative excitation of CO₂⁺ was studied in the molecular frame as a function of probe laser intensity, ellipticity and polarization with respect to the molecular bond at laser wavelengths of 800 nm and 1350 nm. This allowed the identification of the main excitation pathway consisting of tunnel ionization from HOMO-2 followed by a parallel dipole transition from the second excited state B to the predissociating, third excited state C. Recollision excitation was shown to play a negligible role. Using laser induced impulsive alignment, the strong field induced coupling at 800 nm and 1350 nm of the ionic states B and C could thus be controlled by the laser polarization. This leads to a suppression of the fragmentation yield of up to 70% when the laser polarization was perpendicular to the molecular axis compared to parallel polarization. We have performed simulations of various ionization channels of CO2. Our simulations reflect the experimental findings and show that dissociation of CO₂⁺ is induced by tunnelling from deeper molecular orbitals HOMO-1, HOMO-2, HOMO-3, followed by laser driven hole dynamics in the ion.
Published: 2014
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78. Sub-100 nanometer lensless probing of Co/Pd magnetic nanodomains using a table-top femtosecond soft X-ray harmonic source

Author: D. Guillaumet, Bharati Tudu, Jan Lüning, Marina Tortarolo, J. Gautier, Hamed Merdji, F. Lepetit, B. Barbrel, Ranjit R. Hawaldar, F. Wang, Boris Vodungbo, M. Perdrix, M. Billon, X. Ge, Bianca Iwan, Willem Boutu, A. I. Gonzalez, Renaud Delaunay, David Gauthier, Ph. Zeitoun, M. Ducousso, A. Borta, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), and European Union through the EU-LASERLAB EU-FP7 ATTOFEL program X-Motion program French ministry of research through ANR 'Triangle de la Physique' through the COX grant C'NANO research program through the X-NANO C'NANO research program through DYNAVO DYNAVO PosDoc grant European Commission
Subjects: Photon, Materials science, Physics::Optics, single-shot probing, 01 natural sciences, 010305 fluids & plasmas, law.invention, ultrafast spectroscopy, Optics, law, femtosecond laser, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], 0103 physical sciences, High harmonic generation, 010306 general physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Magnetic moment, business.industry, Scattering, Far-infrared laser, Laser, resonant elastic scattering, Atomic and Molecular Physics, and Optics, high harmonic generation, nanomagnetism, Femtosecond, Harmonic, Optoelectronics, business
Abstract: International audience; We present recent developments of our table-top femtosecond high flux harmonic beamline towards single-shot probing of magnetic nanostructures. High harmonic generation (HHG) optimization in a single and two-color infrared laser pulse mode was investigated at high laser energy. Up to 10(9) photons per harmonic are generated between 40 and 80 eV in a single femtosecond laser shot. These soft X-ray harmonic photons are employed to characterize at the nanoscale the magnetic network of Co/Pd multilayer samples using resonant small-angle X-ray scattering. Selecting harmonics in the vicinity of magnetically dichroic absorption resonances of cobalt and palladium (Co M-2,M-3 at 60eV and Pd N-2,N-3 at 51eV) gives access to the magnetic nanodomain spatial structure. The magnetic scattering efficiency at the Pd edge is found to be comparable to that at the Co edge. This indicates that the Pd layers exhibit a significant induced magnetic moment. Magnetic sample optimization is then performed by characterizing its scattering efficiency as a function of layer composition and number of repetitions. We finally measure the spatial organization of magnetic nanodomains with a sub-100nm spatial resolution from a single femtosecond X-ray pulse.
Published: 2013
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79. Electronic dynamics of charge resonance enhanced ionization probed by laser-induced alignment in C2H2

Author: C Cornaggia, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and ANR-10-LABX-0039,PALM,Physics: Atoms, Light, Matter(2010)
Subjects: [PHYS]Physics [physics], Physics, Resonance, Electron, Condensed Matter Physics, Laser, 01 natural sciences, 7. Clean energy, Electromagnetic radiation, Atomic and Molecular Physics, and Optics, Spectral line, 010305 fluids & plasmas, law.invention, law, Ionization, Electric field, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Physics::Atomic Physics, Atomic physics, 010306 general physics, Electron ionization
Abstract: International audience; Although charge resonance enhanced ionization (CREI) be an ubiquitous effect in molecules in strong laser fields, the associated electron emission remains difficult to deal with. The main reason relies on the fact that CREI is part of an overall multielectron ionization, where the initial steps of single and dissociative ionization of neutral species dominate the electron spectrum. Using the rescattered electrons, we show that it is possible to address the electron signal from CREI without any contribution from other electron signals. The electrons from CREI are preferentially emitted when the molecular axis is parallel to the laser electric field as expected from its electronic dynamics. Acetylene is chosen for demonstration purpose because single ionization, which is not related to CREI, is more pronounced when the C$_2$H$_2$ molecular axis is perpendicular to the laser electric field.
Published: 2016
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80. Systèmes Femtoseconde : optique et phénomènes ultrarapides

Author: Mottin, Stephane, Monmayrant, Antoine, Ruchon, Thierry, Bonvalet, Adeline, Lee, Kevin, Joffre, Manuel, Chiche, Ronic, Jehanno, Didier, Picqué, Nathalie, Soskov, Viktor, Variola, Allessandro, Zomer, Fabian, Vauthey, Eric, Vallée, Fabrice, Del Fatti, Natalia, Marie, Xavier, Urbaszek, Bernhard, Renucci, Pierre, Gilliot, Pierre, Druon, Frédéric, Amand, Thierry, Laboratoire Hubert Curien [Saint Etienne] (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Équipe Photonique (LAAS-PHOTO), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Optique et Biosciences (LOB), École polytechnique (X)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Dr. Eric Jackman Institute of Child Study, University of Toronto, Zhejiang Normal University, Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Laboratoire de Photophysique Moléculaire (PPM), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Département de chimie physique [Genève], Université de Genève (UNIGE), Laboratoire de Spectrométrie Ionique et Moléculaire (LASIM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), AP-HP Hôpital Bicêtre (Le Kremlin-Bicêtre), Laboratoire de physique et chimie des nano-objets (LPCNO), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-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)-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)-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), Laboratoire Charles Fabry / Lasers, Laboratoire Charles Fabry (LCF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut d'Optique Graduate School (IOGS), Gilliot Pierre, Mottin Stéphane, Université Toulouse 1 Capitole (UT1), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-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)-Institut de Chimie du CNRS (INC)-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)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, 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)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut d'Optique Graduate School (IOGS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Hubert Curien (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Université de Genève = University of Geneva (UNIGE), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE)
Subjects: [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], attosecond pulses, metal nanoparticle, Femtosecond laser pulse, semiconductor nanostructures, Infra-red Spectrophotometry, Fabry-Perot Microcavity
Abstract: National audience; Sommaire :P. 9 Préface / Béatrice ChatelP. 11 Introduction / Pierre GilliotP. 13 Production d'impulsions femtoseconde et nouveaux matériaux pour le pompage par diode / Frédéric Druon.P. 51 Façonnage et caractérisation d‟impulsions ultra-rapides / Antoine Monmayrant.P. 81 Introduction to the synthesis and the measurement of attosecond pulses / Thierry Ruchon.P. 109 Impulsions infrarouges femtosecondes : génération, caractérisation et applications / Adeline Bonvalet, Kevin F Lee, Manuel Joffre.P. 119 Les Cavités Fabry-Perot en mode pulsé et leurs récentes applications / Ronic Chiche, Didier Jehanno, Nathalie Picqué, Viktor Soskov, Allessandro Variola, Fabian Zomer.P. 171 Les réactions de transfert d'électron photoinduites étudiées par spectroscopie ultrarapide / Eric Vauthey.P. 185 Ultrafast spectroscopy of a single metal nanoparticle / Fabrice Vallée, Natalia Del Fatti.P. 209 Time-resolved optical measurements of the spin coherence in semiconductor nanostructures / Xavier Marie, Bernhard Urbaszek, Pierre Renucci, Thierry Amand.
Published: 2012

81. Flexible attosecond beamline for high harmonic spectroscopy and XUV/near-IR pump probe experiments requiring long acquisition times

Author: Bastian Manschwetus, Thierry Ruchon, Pascal Salières, Y. J. Picard, Marie Géléoc, A Huetz, Pierre Breger, M. Böttcher, Vincent Gruson, M. Bougeard, N. Lin, M. Billon, Bertrand Carré, Sébastien J. Weber, Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Moléculaires d'Orsay (ISMO), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), and Serveurs Laser (SLIC)
Subjects: Materials science, [PHYS.PHYS]Physics [physics]/Physics [physics], Spectrometer, business.industry, Attosecond, Laser, Photoionization, PhotonsVacuum, law.invention, Mirrors, Recoil, Optics, Beamline, law, Polarization, High harmonic generation, Physics::Atomic Physics, Time-resolved spectroscopy, Spectroscopy, business, Instrumentation, chambers
Abstract: International audience; We describe the versatile features of the attosecond beamline recently installed at CEA-Saclay on the PLFA kHz laser. It combines a fine and very complete set of diagnostics enabling high harmonic spectroscopy (HHS) through the advanced characterization of the amplitude, phase, and polarization of the harmonic emission. It also allows a variety of photo-ionization experiments using magnetic bottle and COLTRIMS (COLd Target Recoil Ion Momentum Microscopy) electron spectrometers that may be used simultaneously, thanks to a two-foci configuration. Using both passive and active stabilization, special care was paid to the long term stability of the system to allow, using both experimental approaches, time resolved studies with attosecond precision, typically over several hours of acquisition times. As an illustration, applications to multi-orbital HHS and electron-ion coincidence time resolved spectroscopy are presented.
Published: 2015
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82. Impact of Plasmon-Induced Atoms Migration in Harmonic Generation

Author: Hamed Merdji, Uwe Morgner, Liping Shi, Carsten Reinhardt, Dominik Franz, Rana Nicolas, Willem Boutu, Milutin Kovacev, Jose R. C. Andrade, T. Heidenblut, Institut für Quantenoptik [Hannover] (IQ), Leibniz Universität Hannover [Hannover] (LUH), Centre for Quantum Engineering and Space-time Research (QUEST), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Hochschule Bremen - University of Applied Sciences, Hochschule Bremen, Leibniz Universität Hannover=Leibniz University Hannover, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and ANR-16-CE30-0027,HELLIX,Source laser à taux de répétition élevé pour l'imagerie par diffraction cohérente XUV(2016)
Subjects: Materials science, Physics::Optics, 02 engineering and technology, Dielectric, 01 natural sciences, Molecular physics, Spectral line, 010309 optics, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], carbon contamination, 0103 physical sciences, High harmonic generation, nonlinear frequency upconversion, Electrical and Electronic Engineering, Plasmon, Attenuation, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, metasurface, Optical tweezers, Femtosecond, Harmonic, optical trapping, 0210 nano-technology, nonthermal ablation, Biotechnology
Abstract: International audience; Under illumination of a Ti:sapphire femtosecond oscillator, amplification of third harmonic generation by subwavelength plasmonic apertures is observed. However, the harmonic yield efficiency decays rapidly over time. In this work we investigate the physical phenomena behind the temporal attenuation of the harmonic signal. From high-resolution scanning electron micrographs and two-dimensional energy dispersive X-ray maps, we conclude that the attenuation of the third harmonic is attributed to trapping of a low-density carbon layer inside the plasmonic apertures. Furthermore, we show that the profile of the carbon deposit follows the enhanced electric near-field distribution, which indicates that the carbon atoms are transported to the field hotspot by the plasmonically enhanced optical tweezer effect. From the measurement of linear transmission spectra, we find that the dielectric constant inside the nanoholes is increased by the carbon deposit. However, numerical simulations demonstrate that the increase of dielectric constant does not reduce the electric near-field enhancement factor. Therefore, the decay of third harmonic radiation is primarily due to the strong reabsorption by the carbon deposit inside the gold-free aperture.
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83. Tracking the ultrafast XUV optical properties of x-ray free-electron-laser heated matter with high-order harmonics

Author: P. Renaudin, S. Künzel, Bianca Iwan, A. I. Gonzalez, Eric Galtier, V. Recoules, Marta Fajardo, Hamed Merdji, Gareth O. Williams, C. Blancard, A. G. de la Varga, Hae Ja Lee, V. Hilbert, Richard W. Lee, Guillaume Dovillaire, P. Audebert, Willem Boutu, Eduardo Granados, P.A. Heimann, Pedro Velarde, Bob Nagler, B. Barbrel, James Dunn, Ulf Zastrau, S. Daboussi, Ph. Zeitoun, GoLP/Instituto de Plasmas e Fusão Nuclear-Laboratório Associado, Instituto Superior Técnico, Universidade Técnica de Lisboa (IST), Inst Super Tecn, GoLP Inst Plasmas & Fusao Nucl, Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Institute of optics and quantum electronics, Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), European XFEL GmbH (XFEL), European XFEL GmbH, Centre for Water Research (CWR), The University of Western Australia (UWA), SLAC National Accelerator Laboratory (SLAC), Stanford University, Lawrence Berkeley National Laboratory [Berkeley] (LBNL), 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), Imagine Optic, AFOP, Lawrence Livermore National Laboratory (LLNL), 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), Instituto de Fusión Nuclear, Universidad Politécnica de Madrid (UPM), GoLP/Instituto Superior Tecnico, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Free electron model, Free-electron laser, Electron, Warm dense matter, Laser, 01 natural sciences, 010305 fluids & plasmas, law.invention, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], law, 0103 physical sciences, Femtosecond, Atomic physics, 010306 general physics, Absorption (electromagnetic radiation), Ultrashort pulse
Abstract: International audience; 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.
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84. Observation of magnetic helicoidal dichroism with extreme ultraviolet light vortices

Author: Mauro Fanciulli, Matteo Pancaldi, Emanuele Pedersoli, Mekha Vimal, David Bresteau, Martin Luttmann, Dario De Angelis, Primož Rebernik Ribič, Benedikt Rösner, Christian David, Carlo Spezzani, Michele Manfredda, Ricardo Sousa, Ioan-Lucian Prejbeanu, Laurent Vila, Bernard Dieny, Giovanni De Ninno, Flavio Capotondi, Maurizio Sacchi, Thierry Ruchon, Prejbeanu, Ioan Lucian, Plateforme pour la dynamique attoseconde - - ATTOLAB2011 - ANR-11-EQPX-0005 - EQPX - VALID, Appel à projets générique - Étude du moment angulaire de faisceaux lumineux XUV: synthèse et transferts - - Xstase2014 - ANR-14-CE32-0010 - Appel à projets générique - VALID, NANOSCIENCE FOUNDRIES AND FINE ANALYSIS - EUROPE - NFFA-Europe - - H20202015-09-01 - 2019-08-31 - 654360 - VALID, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Matériaux et des Surfaces (LPMS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CY Cergy Paris Université (CY), Elettra Sincrotrone Trieste, Paul Scherrer Institute (PSI), SPINtronique et TEchnologie des Composants (SPINTEC), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Laboratory of Quantum Optics, University of Nova Gorica, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Institut des Nanosciences de Paris (INSP), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Swiss National Science Foundation project No. P2ELP2 181877, ANR-11-EQPX-0005,ATTOLAB,Plateforme pour la dynamique attoseconde(2011), ANR-14-CE32-0010,Xstase,Étude du moment angulaire de faisceaux lumineux XUV: synthèse et transferts(2014), European Project: 654360,H2020,H2020-INFRAIA-2014-2015,NFFA-Europe(2015), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), State Key Laboratory of Quantum Optics and Quantum Optics devices, Shanxi University, Croissance et propriétés de systèmes hybrides en couches minces (INSP-E8), and Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], [PHYS]Physics [physics], FOS: Physical sciences, General Physics and Astronomy, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Optics (physics.optics), [PHYS] Physics [physics], Physics - Optics
Abstract: We report on the experimental evidence of magnetic helicoidal dichroism, observed in the interaction of an extreme ultraviolet vortex beam carrying orbital angular momentum with a magnetic vortex. Numerical simulations based on classical electromagnetic theory show that this dichroism is based on the interference of light modes with different orbital angular momenta, which are populated after the interaction between the light phase chirality and the magnetic topology. This observation gives insight into the interplay between orbital angular momentum and magnetism, and sets the framework for the development of new analytical tools to investigate ultrafast magnetization dynamics., 7 pages, 4 figures
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85. Investigating the origin of third harmonic generation from diabolo optical antennas

Author: Jose R. C. Andrade, Dominik Franz, Bert Bastiaens, Rana Nicolas, Seunghwoi Han, Uwe Morgner, Frans B. Segerink, Hamed Merdji, Liping Shi, Seung-Woo Kim, T. Heidenblut, Willem Boutu, Hyunwoong Kim, Milutin Kovacev, Optical Sciences, Laser Physics & Nonlinear Optics, Leibniz Universität Hannover [Hannover] (LUH), Institut für Quantenoptik [Hannover] (IQ), Department of Electrical Engineering [Korea Advanced Institute of Science and Technology] (KAIST), Korea Advanced Institute of Science and Technology (KAIST), Université Libanaise, Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Attophysique (ATTO), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDyl), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut für Werkstoffkunde, Leibniz Universität Hannover, Institute for Nanotechnology (MESA+), University of Twente [Netherlands], Leibniz Universität Hannover=Leibniz University Hannover, and University of Twente
Subjects: Plasmons, Electric fields, Sapphire, Physics and Astronomy (miscellaneous), Localized surface plasmon polaritons, Pump intensities, Nanophotonics, Localized surface plasmon, 02 engineering and technology, Optical antennas, 01 natural sciences, Dielectric materials, Harmonic analysis, Bow-tie antennas, Optics, Surface plasmon resonance, 0103 physical sciences, Polariton, High harmonic generation, ddc:530, Electromagnetic wave polarization, 010306 general physics, Dielectric substrates, ComputingMilieux_MISCELLANEOUS, Plasmon, Field enhancement, [PHYS]Physics [physics], Physics, Photons, Harmonic generation, business.industry, Nanoantennas, Surface plasmon, 021001 nanoscience & nanotechnology, Harmonic, Optoelectronics, Strong electric fields, Nanorod, Antennas, Nanorods, Gold, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, 0210 nano-technology, business
Abstract: We propose to use diabolo nanoantennas for experimentally investigating the origin of the enhanced third harmonic generation by localized surface plasmon polaritons. In such a geometry, the opposing apexes of bowties are electrically connected by a thin gold nanorod, which has two important functions in discriminating the point of harmonic generation. First, the inserted gold nanorod shifts the field enhancement area to be far away from the dielectric substrate material. Next, the accumulation of free charges at the adjacent bowtie tips produces a strong electric field inside the gold nanorod. The diabolo nanoantennas allow us to examine the contribution of the bare gold susceptibility to the third harmonic conversion. Our results reveal that the bare gold does not significantly enhance the harmonic generation at high pump intensity. From this, we deduce that in regular bowtie antennas, the enhanced harmonic photons mainly arise from the substrate sapphire that is located in the feedgap of the bowtie, where the electric near-field is significantly enhanced by the localized surface plasmons. © 2017 Author(s).
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85 results on '"Attophysique (ATTO)"'

51. Interferometric control of the ellipticity of a femtosecond extreme ultraviolet source

52. Coulomb explosion imaging of CH3I and CH2CII photodissociation dynamics

53. Tunable mid-infrared source of light carrying orbital angular momentum in the femtosecond regime

54. Attosecond metrology: Optical waveform reconstruction

55. Optical waveform reconstruction

56. Precise Access to the Molecular-Frame Complex Recombination Dipole through High-Harmonic Spectroscopy

57. Dynamic wavefront rotation in the attosecond lighthouse

58. Phase-Resolved Two-Dimensional Spectroscopy of Electronic Wavepackets by Laser-Induced XUV Free Induction Decay

59. Tunable orbital angular momentum in high-harmonic generation

60. Elastoplasmonic interaction in metal-insulator-metal localized surface plasmon systems

61. Origin of ellipticity of high-order harmonics generated by a two-color laser field in the cross-polarized configuration

62. Determination of accurate electron chiral asymmetries in fenchone and camphor in the VUV range: sensitivity to isomerism and enantiomeric purity

63. Impact of noise in holography with extended references in the low signal regime

64. Attosecond lighthouses in gases: A theoretical and numerical study

65. Molecular frame photoemission by a comb of elliptical high-order harmonics: a sensitive probe of both photodynamics and harmonic complete polarization state

66. Combined high-harmonic interferometries for vectorial spectroscopy

67. Temporal analysis of fractional revivals of molecular observables following impulsive alignment

68. A zero dead-time multi-particle time and position sensitive detector based on correlation between brightness and amplitude

69. A table-top ultrashort light source in the extreme ultraviolet for circular dichroism experiments

70. Multi-channel electronic and vibrational dynamics in polyatomic resonant high-order harmonic generation

71. Transverse Electromagnetic Mode Conversion for High-Harmonic Self-Probing Spectroscopy

72. Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers

73. High-harmonic phase spectroscopy using a binary diffractive optical element

74. Attosecond evolution of energy- and angle-resolved photoemission spectra in two-color (XUV + IR) ionization of rare gases

75. Applications of ultrafast wavefront rotation in highly nonlinear optics

76. Self-Probing Spectroscopy of the SF 6 Molecule: A Study of the Spectral Amplitude and Phase of the High Harmonic Emission

77. Control and identification of strong field dissociative channels in CO₂⁺ via molecular alignment

78. Sub-100 nanometer lensless probing of Co/Pd magnetic nanodomains using a table-top femtosecond soft X-ray harmonic source

79. Electronic dynamics of charge resonance enhanced ionization probed by laser-induced alignment in C2H2

80. Systèmes Femtoseconde : optique et phénomènes ultrarapides

81. Flexible attosecond beamline for high harmonic spectroscopy and XUV/near-IR pump probe experiments requiring long acquisition times

82. Impact of Plasmon-Induced Atoms Migration in Harmonic Generation

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

84. Observation of magnetic helicoidal dichroism with extreme ultraviolet light vortices

85. Investigating the origin of third harmonic generation from diabolo optical antennas

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85 results on '"Attophysique (ATTO)"'

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