Steering the energy sharing of electrons in nonsequential double ionization with orthogonally polarized two-color field  

作　　者：樊光琦 杨志杰 孙烽豪 郑金梅 韩云天 黄明谦 刘情操 Guangqi Fan;Zhijie Yang;Fenghao Sun;Jinmei Zheng;Yuntian Han;Mingqian Huang;Qingcao Liu(College of Science,Harbin Institute of Technology,Weihai 264209,China;School of Information Science and Engineering,Harbin Institute of Technology,Weihai 264209,China;Harbin Institute of Technology,Weihai 264209,China)

机构地区：[1]College of Science,Harbin Institute of Technology,Weihai 264209,China [2]School of Information Science and Engineering,Harbin Institute of Technology,Weihai 264209,China [3]Harbin Institute of Technology,Weihai 264209,China

出　　处：《Chinese Physics B》2024年第8期248-252,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.12204132 and 12304376);Excellent Youth Science Foundation of Shandong Province (Overseas) (Grant No.2022HWYQ-073);the Fundamental Research Funds for the Central Universities (Grant No.HIT.OCEF.2022042);Natural Science Foundation of Shandong Province (Grant No.ZR2023QA075)。

摘　　要：Using the semiclassical ensemble model,the dependence of relative amplitude for the recollision dynamics in nonsequential double ionization(NSDI)of neon atom driven by the orthogonally polarized two-color field(OTC)laser field is theoretically studied.And the dynamics in two typical collision pathways,recollision-impact-ionization(RII)and recollisionexcitation with subsequent ionization(RESI),is systematically explored.Our results reveal that the V-shaped structure in the correlated momentum distribution is mainly caused by the RII mechanism when the relative amplitude of the OTC laser field is zero,and the first ionized electrons will quickly skim through the nucleus and share few energy with the second electron.As the relative amplitude increases,the V-shaped structure gradually disappears and electrons are concentrated on the diagonal in the electron correlation spectrum,indicating that the energy sharing after electrons collision is symmetric for OTC laser fields with large relative amplitudes.Our studies show that changing the relative amplitude of the OTC laser field can efficiently control the electron–electron collisions and energy exchange efficiency in the NSDI process.

关 键 词：nonsequential double ionization correlated electron–electron momentum distribution energy sharing of electrons orthogonally polarized two-color field laser field semiclassical ensemble models 

分 类 号：O56[理学—原子与分子物理]