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

doi:10.1088/1674-1056/ad4bc0

中国物理B ›› 2024, Vol. 33 ›› Issue (8): 83102-083102.doi: 10.1088/1674-1056/ad4bc0

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

Guangqi Fan(樊光琦)^1,†, Zhijie Yang(杨志杰)^1,†, Fenghao Sun(孙烽豪)^2,‡, Jinmei Zheng(郑金梅)³, Yuntian Han(韩云天)¹, Mingqian Huang(黄明谦)¹, and Qingcao Liu(刘情操)^1,§

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

收稿日期:2024-03-11 修回日期:2024-05-03 接受日期:2024-05-15 发布日期:2024-07-15
通讯作者: Fenghao Sun, Qingcao L E-mail:fhsun@hit.edu.cn;qingcao.liu@hit.edu.cn
基金资助:
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), and Natural Science Foundation of Shandong Province (Grant No. ZR2023QA075).

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

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

Received:2024-03-11 Revised:2024-05-03 Accepted:2024-05-15 Published:2024-07-15
Contact: Fenghao Sun, Qingcao L E-mail:fhsun@hit.edu.cn;qingcao.liu@hit.edu.cn
Supported by:
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), and Natural Science Foundation of Shandong Province (Grant No. ZR2023QA075).

摘要/Abstract

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 recollision-excitation 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

Abstract: 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 recollision-excitation 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.

Key words: nonsequential double ionization, correlated electron-electron momentum distribution, energy sharing of electrons, orthogonally polarized two-color field laser field, semiclassical ensemble models

中图分类号: (Electron correlation calculations for atoms, ions and molecules)

31.15.V-

32.80.Rm (Multiphoton ionization and excitation to highly excited states) 34.50.Fa (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)) 34.80.Dp (Atomic excitation and ionization)

Guangqi Fan(樊光琦), Zhijie Yang(杨志杰), Fenghao Sun(孙烽豪), Jinmei Zheng(郑金梅), Yuntian Han(韩云天), Mingqian Huang(黄明谦), and Qingcao Liu(刘情操). Steering the energy sharing of electrons in nonsequential double ionization with orthogonally polarized two-color field[J]. 中国物理B, 2024, 33(8): 83102-083102.

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

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

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