Peer-reviewed Publications |
Al Shorman, M. M., Gharaibeh, M. F., Bizau, J. M., Cubaynes, D., Guilbaud, S., El Hassan, N., Miron, C., Nicolas, C., Robert, E., Sakho, I., Blancard, C., & McLaughlin, B. M. (2013). K-shell photoionization of Be-like and Li-like ions of atomic nitrogen: experiment and theory. JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 46(19), 195701.
Résumé: Absolute cross sections for the K-shell photoionization of Be-like and Li-like atomic nitrogen ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron radiation facility in Saint-Aubin, France. High-resolution spectroscopy at nominal resolutions of 38, 56, 111, 133 meV full width at half maximum (FWHM) for Be-like and 125 meV FWHM for Li-like atomic nitrogen ions was achieved for the photon energies ranging from 410 up to 460 eV. The experimental measurements are compared with theoretical estimates from the multi-configuration Dirac-Fock, R-matrix and an empirical method. The interplay between experiment and theory enabled the identification and characterization of the strong 1s -> 2p resonances features observed in the K-shell spectra of each ion and the region around 460 eV for the 1s -> 3p resonance of the N3+ ion yielding suitable agreement with experiment.
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Atabek, O., Lefebvre, R., Jaouadi, A., & Desouter-Lecomte, M. (2013). Proposal for laser purification in molecular vibrational cooling using zero-width resonances. PHYSICAL REVIEW A, 87, 031403.
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Bomme, C., Guillemin, R., Marin, T., Journel, L., Marchenko, T., Dowek, D., Trcera, N., Pilette, B., Avila, A., Ringuenet, H., Kushawaha, R. K., & Simon, M. (2013). Double momentum spectrometer for ion-electron vector correlations in dissociative photoionization. REVIEW OF SCIENTIFIC INSTRUMENTS, 84(10), 103104.
Résumé: We have developed a new momentum spectrometer dedicated to momentum vector correlations in the context of deep core photoionization of atomic and molecular species in the gas phase. In this article, we describe the design and operation of the experimental setup. The capabilities of the apparatus are illustrated with a set of measurements done on the sulphur core 1s photoionization of gas-phase CS2. (C) 2013 AIP Publishing LLC.
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Calisti A., F. S., Mossé C., Talin B., Klisnick A., Meng L., Benredjem D., Guilbaud O. (2013). Line Profiles of Ni-like Collisional XUV Laser Amplifiers: Particle Correlation Effects. HEDP, 9(3), 516–522.
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Charron, E., & Sukharev, M. (2013). Non-Hermitian wave packet approximation of Bloch optical equations. J. Chem. Phys., 138, 024108.
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Douce T., Eckstein A., Walborn S. P., Khoury A. Z., Ducci S., Keller A., Coudreau T., & Milman P. (2013). Direct measurement of the biphoton Wigner function through two-photon interference. Scientific Reports, 3, 3530.
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Hoendervanger, A. L., Clement, D., Aspect, A., Westbrook, C. I., Dowek, D., Picard, Y. J., & Boiron, D. (2013). Influence of gold coating and interplate voltage on the performance of chevron micro-channel plates for temporally and spatially resolved single particle detection. REVIEW OF SCIENTIFIC INSTRUMENTS, 84(2), 023307.
Résumé: We present a study of two different sets of Micro-Channel Plates used for time and space resolved single particle detection. We investigate the effects of the gold coating and that of introducing an interplate voltage between the spatially separated plates. We find that the gold coating increases the count rate of the detector and the pulse amplitude as previously reported for non-spatially resolved setups. The interplate voltage also increases count rates. In addition, we find that a non-zero interplate voltage improves the spatial accuracy in determining the arrival position of incoming single particles (by ~20%) while the gold coating has a negative effect (by ~30%).
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Jaouadi, A., Desouter-Lecomte M., Lefebvre, R., & Atabek, O. (2013). Signature of exceptional points in the laser control of non-adiabatic vibrational transfer. J. Phys. B: At. Mol. Opt. Phys., 46, 145402.
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Jaouadi, A., Desouter-Lecomte, M., Lefebvre, R., & Atabek, O. (2013). Exceptional points for logic operations at the molecular level. Fortschritte der Physik, 61, 162.
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Kokoouline, V., Wearne, A., Lefebvre, R., & Atabek, O. (2013). Laser-controlled rotational cooling of Na2 based on exceptional points. PHYSICAL REVIEW A, 88, 033408.
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Larroche, O., & Klisnick, A. (2013). Two-dimensional Maxwell-Bloch simulation of quasi-π-pulse amplification in a seeded XUV laser. Phys. Rev. A, 88(3), 033815.
Résumé: The amplification of high-order-harmonics (HOH) seed pulses in a swept-gain XUV laser is investigated through numerical simulations of the full set of Bloch and two-dimensional paraxial propagation equations with our code colax. The needed atomic data are taken from a hydrodynamics and collisional-radiative simulation in the case of a Ni-like Ag plasma created from the interaction of an infrared laser with a solid target and pumped in the transient regime. We show that the interplay of strong population inversion and diffraction or refraction due to the short transverse dimensions and steep density gradient of the active plasma can lead to the amplification of an intense, ultrashort, quasi-“π” pulse triggered by the incoming seed. By properly tuning the system geometry and HOH pulse parameters, we show that an ≃10 fs, 8×1012 W/cm2 amplified pulse can be achieved in a 3-mm-long Ni-like Ag plasma, with a factor of ≳10 intensity contrast with respect to the longer-lasting wake radiation and amplified spontaneous emission.
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Larroche, O., Meng, L., Le Marec, A., & Klisnick, A. (2013). Inversion density threshold for Rabi oscillations and modified small-signal gain in extreme-ultraviolet lasers. OPTICS LETTERS, 38(14), 2505–2508.
Résumé: An expression is proposed for a threshold discriminating between classical quasi-steady-state amplification and a strong pumping regime where a new dynamic behavior shows up in plasma-based extreme-ultraviolet (XUV) lasers. The criterion derived is applied to laser systems currently investigated in various laboratories. It is found that only high-gain XUV laser systems can be driven in that dynamic regime, associated with Rabi oscillations. For those systems, the small-signal dynamic gain accounting for the exponential amplification of the laser intensity is shown to be significantly smaller than the adiabatic value usually inferred from numerical simulations. (C) 2013 Optical Society of America
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Lefebvre, C., Nguyen-Dang, T. T., Dion, F., Vrakking, M. J. J., Serov, V. N., & Atabek, O. (2013). Attosecond pump-probe transition-state spectroscopy of laser-induced molecular dissociative ionization: Adiabatic versus nonadiabatic dressed-state dynamics. PHYSICAL REVIEW A, 88(5), 053416.
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Lefebvre, R., & Atabek, O. (2013). Dissociation quenching using exceptional points. Journal of Molecular Modeling, 19, 1959.
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Marggi Poullain, S., Veyrinas, K., Billaud, P., Lebech, M., Picard, Y. J., Lucchese, R. R., & Dowek, D. (2013). The role of Rydberg states in photoionization of NO2 and (NO+, O-) ion pair formation induced by one VUV photon. JOURNAL OF CHEMICAL PHYSICS, 139(4), 044311.
Résumé: We report a combined experimental and theoretical study of photoionization (PI) of the NO2 molecule into the NO2+ (X-1 Sigma(+)(g)) ground state and the photodissociation of NO2 into the NO+((1)Sigma(+)) + O-(P-2) ion pair. These processes were induced by 10.9 eV-13 eV synchrotron radiation and the products were detected using electron-ion or O--NO+ coincident momentum spectroscopy. The results demonstrate the strong influence of [R*(4b(2))(-1), nl alpha(i), v'(2)] Rydberg states vibrationally resolved in the v'(2) bending modes for both processes. In particular, we emphasize two regions around 11.5 eV and 12.5 eV that were studied in more detail for their relevance to 400 nm multiphoton ionization induced by femtosecond pulses. The photoelectron energy spectra and asymmetry parameters support the existence of two PI mechanisms, as probed with the help of fixed-nuclei frozen-core Hartree-Fock calculations. We found significant deviations from Franck-Condon ionization predictions which may be assigned to vibronic coupling of NO2* states such as that induced by a conical intersection. The limited agreement between theory and experiment, even for the non-resonant processes, indicates the need for calculations that go beyond the approximations used in the current study. Ion pair formation leads to strong vibrational and rotational excitation of the NO+((1)Sigma(+), v) product, with an ion fragment angular anisotropy depending on both the v'(2) bending quantum number of the excited parent molecule and the v vibrational level of the fragment. (C) 2013 AIP Publishing LLC.
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O'Keeffe, P., Gryzlova, E. V., Cubaynes, D., Garcia, G. A., Nahon, L., Grum-Grzhimailo, A. N., & Meyer, M. (2013). Isotopically Resolved Photoelectron Imaging Unravels Complex Atomic Autoionization Dynamics by Two-Color Resonant Ionization. PHYSICAL REVIEW LETTERS, 111(24), 243002.
Résumé: Angle-resolved electron spectroscopy in coincidence with high-resolution mass spectroscopy has been applied to study two-color resonant photoionization in atomic xenon. Separation of different isotopes enabled us to extract results for the electronic dynamics free from depolarization effects, which are generally introduced by the coupling of the electronic and nuclear angular momenta. The concerted experimental and theoretical analysis of the photoelectron angular distributions in the region of an autoionizing resonance emphasizes the strong sensitivity of the observed structures to the fine details of the treatment of the underlying dynamics.
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Orieux, A., Eckstein, A., Lemaître, A., Filloux, P., Favero, I., Leo, G., Coudreau, T., Keller, A., Milman, P., & Ducci, S. (2013). Direct Bell States Generation on a III-V Semiconductor Chip at Room Temperature. PRL, 110(16), 160502.
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Sebban, S., Zeitoun, P., & Klisnick, A. (2013). Breakthroughs in Photonics 2012: New Advances in Soft X-Ray Lasers and Applications. IEEE PHOTONICS JOURNAL, 5(2), 0700204.
Résumé: This paper reviews the major accomplishments in the development of plasma-based soft X-ray lasers and their applications in 2012. Significant experimental breakthroughs include the extension of the lasing range down to 1.5 nm in an X-FEL photoionized plasma and the 100-Hz operation of a 18.9-nm laser with a record average power of 0.15 mW. New fields of applications, exploiting the high-brightness, coherence, and compactness of the source, were demonstrated. Further breakthroughs toward higher peak power are anticipated from numerical simulations of injection-seeded soft X-ray lasers.
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Sugny, D., Vranckx, S., Ndong, M., Atabek, O., & Desouter-Lecomte, M. (2013). External constraints on optimal control strategies in molecular orientation and photofragmentation: role of zero-area fields. Journal of Modern Optics, 61, 816.
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Veyrinas, K., Elkharrat, C., Marggi Poullain, S., Saquet, N., Dowek, D., Lucchese, R. R., Garcia, G. A., & Nahon, L. (2013). Complete determination of the state of elliptically polarized light by electron-ion vector correlations. PHYSICAL REVIEW A, 88(6), 063411.
Résumé: We propose a method, molecular polarimetry, applicable to an extended VUV-x-ray range, allowing us to determine the complete state of elliptically polarized light, including the challenging disentanglement of the circular and unpolarized components. It relies on the determination of the molecular frame photoelectron angular distributions derived from electron-ion velocity vector correlations in dissociative photoionization of simple molecules. The high accuracy of the full set of Stokes parameters determination has been established by comparison with data obtained in parallel with a VUV optical polarimeter used as a benchmark.
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Procédures de Conférences |
Klisnick, A., & Menoni, C. S. (2013). X-Ray Lasers and Coherent X-Ray Sources: Development and Applications X Introduction (Vol. 8849).
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Actes de Conférences |
Klisnick, A., Meng, L. M., Le Marec, A., & Larroche, O. (2013). Modeling and numerical simulations of seeded XUV lasers with the COLAX code: recent progress. In X-Ray Lasers And Coherent X-Ray Sources: Development And Applications X (Vol. 8849).
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Kozlova, M., Nejdl, J., Klisnick, A., Le Marec, A., Meng, L., Tissandier, F., Fok, T., Wegrzynski, L., Bartnik, A., Wachulak, P., Jarocki, R., & Fiedorowicz, H. (2013). Development and applications of X-ray lasers at PALS Centre. In X-Ray Lasers And Coherent X-Ray Sources: Development And Applications X (Vol. 8849).
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Kuehl, T., Aurand, B., Bagnoud, V., Ecker, B., Eisenbarth, U., Hochhaus, D., Neumayer, P., Zhao, H. Y., Zielbauer, B., Zimmer, D., Habib, J., Kazamias, S., Klisnick, A., Ros, D., Seres, J., Spielmann, C., & Ursescu, D. (2013). Laser Driven Secondary Sources For Spectroscopy, Plasma Diagnostics And Other Applications. In Modern Trends In Physics Research (pp. 179–181).
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Larroche O., K. A. (2013). Two-dimensional Maxwell-Bloch simulation of ultrashort pulse amplification in a swept-gain soft X-ray laser. In X-RAY LASERS 2012 (Vol. 147).
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