题目：飞秒激光成丝传输的热力学效应及其应用
报告人：Aurelien Houard, 法国巴黎综合理工大学，研究员
时间：2018年12月12日，上午10:00
地点：光电大楼104室
联系人：刘一 教授
Abstract:
When a femtosecond laser beam with multi-gigawatt peak power is gently focused in air, it tends to form a long and thin plasma column though a process called laser filamentation. This plasma rapidly evolves into a hot gas column emitting a cylindrical shock wave [1]. While the shockwave appears to be a promising source for sonar in water, the hot gas column can be used to guide meter-scale electric discharges and to control supersonic flow. In this talk I will review recent advances obtained at LOA on the development of a laser lightning rod [2], the control of shockwave to improve supersonic vehicles [3] and laser induced underwater acoustics [4].
[1] Energy deposition from focused terawatt laser pulses in air undergoing multifilamentation, G. Point, E. Thouin, A. Mysyrowicz and A. Houard, Optics Express 24, 6271 (2016)
[2] Study of filamentation with a high power high repetition rate ps laser at 1.03 µm, A. Houard, V. Jukna, G. Point, Y-B. André, S. Klingebiel, M. Schultze, K. Michel, T. Metzger, and A. Mysyrowicz, Optics Express 24, 7437 (2016)
[3] Improving supersonic flights with femtosecond laser filamentation, P.-Q. Elias, N. Severac, J.-M. Luyssen, Y.-B. André, I. Doudet, B. Wattellier, J.-P. Tobeli, S. Albert, B. Mahieu, R. Bur, A. Mysyrowicz and A. Houard, Science Advances 4, eaau5239 (2018)
[4] Underwater acoustic wave generation by filamentation of terawatt ultrashort laser pulses, V. Jukna, A. Jarnac, C. Milián, Y. Brelet, J. Carbonnel, Y.-B. André, R. Guillermin, J.-P. Sessarego, D. Fattaccioli, A. Mysyrowicz, A. Couairon, and A. Houard, Physical Review E 93, 063106 (2016)
个人简历:
Dr. Aurélien HOUARD is a research scientist at the Laboratory of Applied Optics (LOA) in France. His research activities focus on the study of femtosecond laser filamentation and the development of applications based on filamentation such as the remote generation of THz and UV lasing radiation in atmosphere, aerodynamic control and acoustic wave generation or triggering of electric discharges and lightning with laser.
Aurelien Houard obtained a Ph.D. degree from Ecole Polytechnique in 2008. His work on the “generation of Terahertz radiation from laser filamentation in air” received the PhD thesis award from Ecole polytechnique. He was then hired as a research scientist at LOA. In 2010 he became the leader of Laser Matter Interaction group and obtained in 2015 his « These d’habilitation à Diriger les recherches » at Université Paris VI, second thesis opening up the possibility to supervise PhD students in France. In the last 6 years he has supervised 8 Master students, 4 post-doctoral fellows and three PhD students, who received several PhD awards. He is the author or co-author of 68 articles in international peer-reviewed journals (including 1 Science Advances, 12 Physical Review Letters), 3 book chapters and 1 patent and has presented 20 invited talks in international conferences.
He is currently the coordinator of an important European project aiming at developing the first Laser Lightning Rod in collaboration with University of Geneva, EPFL, Trumpf Scientific laser and Airbus Company.