Probing time delay of strong-field resonant above-threshold ionization  

作　　者：Shengliang Xu Qingbin Zhang Cheng Ran Xiang Huang Wei Cao Peixiang Lu 徐胜亮;张庆斌;冉成;黄湘;曹伟;陆培祥(School of Physics and Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]School of Physics and Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [2]Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology,Wuhan 430205,China

出　　处：《Chinese Physics B》2021年第1期215-220,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11574101,11674116,11774111,and 11934006);the Open Fund of Hubei Provincial Key Laboratory of Optical Information and Pattern Recognition(Grant No.201902);the International Cooperation Program of Hubei Innovation Fund(Grant No.2019AHB052)。

摘　　要：The high-resolution three-dimensional photoelectron momentum distributions via above-threshold ionization(ATI)of Xe atoms are measured in an intense near circularly polarized laser field using velocity map imaging and tomography reconstruction. Compared to the linearly polarized laser field, the employed near circularly polarized laser field imposes a more strict selection rule for the transition via resonant excitation, and therefore we can selectively enhance the resonant ATI through certain atomic Rydberg states. Our results show the self-reference ionization delay, which is determined from the difference between the measured streaking angles for nonadiabatic ATI via the 4 f and 5 f Rydberg states, is 45.6 as. Our method provides an accessible route to highlight the role of resonant transition between selected states, which will pave the way for fully understanding the ionization dynamics toward manipulating electron motion as well as reaction in an ultrafast time scale.

关 键 词：above threshold ionization resonant ionization delay transition selection rule 

分 类 号：O437[机械工程—光学工程]