Role of potential on high-order harmonic generation from atoms irradiated by bichromatic counter-rotating circularly polarized laser fields  

作　　者：Xu-Xu Shen Jun Wang Fu-Ming Guo Ji-Gen Chen Yun-Jun Yang 申许许;王俊;郭福明;陈基根;杨玉军(Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China;Zhejiang Provincial Key Laboratory for Cutting Tools,Taizhou University,Taizhou 318000,China)

机构地区：[1]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China [2]Zhejiang Provincial Key Laboratory for Cutting Tools,Taizhou University,Taizhou 318000,China

出　　处：《Chinese Physics B》2020年第8期211-216,共6页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant Nos.2019YFA0307700 and 2017YFA0403300);the National Natural Science Foundation of China(Grant Nos.11627807,11774175,11534004,11774129,11975012,and 11604119);the Fundamental Research Funds for the Central Universities of China(Grant No.30916011207);the Jilin Provincial Research Foundation for Basic Research,China(Grant No.20170101153JC).

摘　　要：We investigate high-order harmonic generation from atoms irradiated by bichromatic counter-rotating circularly polarized laser pulses by numerically solving the time-dependent Schrödinger equation.It is found that the minimum energy position of the harmonic spectrum and the non-integer order optical radiation are greatly discrepant for different atomic potentials.By analyzing the quantum trajectory of the harmonic emission,discrepancies among the harmonic spectra from different potentials can be attributed to the action of the potential on the ionized electrons.In addition,based on the influence of the driving light intensity on the overall intensity and ellipticity of higher order harmonics,the physical conditions for generating a high-intensity circularly polarized harmonic can be obtained.

关 键 词：high-order harmonic generation bichromatic counter-rotating circularly polarized laser fields channel closing effect quantum trajectory interference 

分 类 号：TN24[电子电信—物理电子学] O436.3[机械工程—光学工程]