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Your search keyword '"Magali Lozano"' showing total 3 results
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3 results on '"Magali Lozano"'

1. Non-contact XUV metrology of Ru/B 4 C multilayer optics by means of Hartmann wavefront analysis

Author

Lu Li, Hugo Dacasa, Magali Lozano, Davide Bleiner, Mabel Ruiz-Lopez, Benoît Mahieu, Philippe Zeitoun, Swiss Federal Laboratories for Materials Science and Technology [Dübendorf] (EMPA), Deutsches Elektronen-Synchrotron [Hamburg] (DESY), Laboratoire d'optique appliquée (LOA), and École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics - Instrumentation and Detectors, Materials science, FOS: Physical sciences, 01 natural sciences, 010309 optics, Optics, 0103 physical sciences, High harmonic generation, Electrical and Electronic Engineering, Engineering (miscellaneous), Lithography, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, Wavefront, [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Instrumentation and Detectors (physics.ins-det), Wavefront sensor, Atomic and Molecular Physics, and Optics, Metrology, Wavelength, Extreme ultraviolet, Reflection (physics), business, Optics (physics.optics), Physics - Optics
Abstract

Short-wavelength imaging, spectroscopy, and lithography scale down the characteristic length-scale to nano meters. This poses tight constraints on the optics finishing tolerances, which is often difficult to characterize. Indeed, even a tiny surface defect degrades the reflectivity and spatial projection of such optics. In this study, we demonstrate experimentally that a Hartmann wavefront sensor for extreme ultraviolet (XUV) wavelengths is an effective non-contact analytical method for inspecting the surface of multilayer optics. The experiment was carried out in a tabletop laboratory using a high-order harmonic generation as an XUV source. The wavefront sensor was used to measure the wavefront errors after the reflection of the XUV beam on a spherical Ru/B4C multilayer mirror, scanning a large surface of approximately 40 mm in diameter. The results showed that the technique detects the aberrations in the nanometer range., 6 pages, 4 figures

Published
2018

2. 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

3. Polarization control of high order harmonics in the EUV photon energy range

Author

Anna Barszczak Sardinha, Jan Lüning, Franck Delmotte, Guillaume Lambert, Magali Lozano, Boris Vodungbo, Julien Gautier, Philippe Zeitoun, Constance Valentin, Grégory Iaquaniello, Stéphane Sebban, Laboratoire d'optique appliquée (LOA), École Nationale Supérieure de Techniques Avancées (ENSTA Paris)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Grupo de Lasers e Plasmas, Instituto Superior Tcnico, Laboratoire Charles Fabry de l'Institut d'Optique / Scop, Laboratoire Charles Fabry de l'Institut d'Optique (LCFIO), 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)-Université Paris-Sud - Paris 11 (UP11), 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), and 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)

Subjects
Ultraviolet Rays, Elliptical polarization, 01 natural sciences, 7. Clean energy, law.invention, 010309 optics, Optics, law, 0103 physical sciences, 010306 general physics, Circular polarization, Lenses, Physics, Photons, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], business.industry, Linear polarization, Magnetic circular dichroism, Lasers, Equipment Design, Laser, Polarization (waves), Atomic and Molecular Physics, and Optics, Equipment Failure Analysis, Refractometry, Harmonics, Optoelectronics, business, Ultrashort pulse
Abstract

International audience; We report the generation of circularly polarized high order harmonics in the extreme ultraviolet range (18-27 nm) from a linearly polarized infrared laser (40 fs, 0.25 TW) focused into a neon filled gas cell. To circularly polarize the initially linearly polarized harmonics we have implemented a four-reflector phase-shifter. Fully circularly polarized radiation has been obtained with an efficiency of a few percents, thus being significantly more efficient than currently demonstrated direct generation of elliptically polarized harmonics. This demonstration opens up new experimental capabilities based on high order harmonics, for example, in biology and materials science. The inherent femtosecond time resolution of high order harmonic generating table top laser sources renders these an ideal tool for the investigation of ultrafast magnetization dynamics now that the magnetic circular dichroism at the absorption M-edges of transition metals can be exploited

Published
2011

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