报告题目：Recent results in impulsive molecular alignment induced by resonant excitation

报告人：Prof. Olivier Faucher

报告人单位：Université Bourgogne Europe

主持人：马俊杨 副研究员

报告时间：5月6日（周三）上午10:00

地点：闵行校区光学大楼B325会议室

报告摘要：

In 2024, we reported the first observation of molecular alignment achieved through resonant excitation of an electronic transition in the iodine molecule using a single short laser pulse [1]. We demonstrated two key features of the resonant regime: a nearly order-of-magnitude enhancement in alignment efficiency and the ability to achieve persistent planar alignment, which had previously only been observed using a sequence of cross-polarized femtosecond pulses [2]. In this presentation, we will discuss recent results on dynamical alignment induced by excitation of a vibrational transition within the ground electronic state of a molecule using a mid-infrared femtosecond pulse.

1. M. Bournazel, A. Espaignol, D. Singh, R. K. Bhalavi, F. Billard, P. Béjot, E. Hertz and O. Faucher, Phys. Rev. Lett. 133, 133201 (2024).

2. M. Z. Hoque, M. Lapert, E. Hertz, F. Billard, D. Sugny, B. Lavorel and O. Faucher, Phys. Rev. A 84, 013409 (2011).

报告人简介：

Olivier Faucher received his PhD in nonlinear optics jointly from the CEASaclay (France) and the University of Lille (France) in 1991. After performingpostdoctoral research at FORTH-IESL (Greece) from 1992 to 1994,he joined the University of Burgundy (France) in 1995, being currently afull professor in physics and head of the Femtosecond Laser Group. Hiscurrent research interest is related to molecules exposed to strong laserfields, including molecular alignment, laser coherent control, and productionof harmonic radiations.