Manipulating the electron dynamics in the non-sequential double ionization process of Ar atoms by an orthogonal two-color laser field

doi:10.1088/1674-1056/ad2606

中国物理B ›› 2024, Vol. 33 ›› Issue (6): 63201-063201.doi: 10.1088/1674-1056/ad2606

Manipulating the electron dynamics in the non-sequential double ionization process of Ar atoms by an orthogonal two-color laser field

Pengzhao Wang(王鹏昭)¹, Lijie Qian(钱丽洁)¹, Zhenrong Sun(孙真荣)^1,2,†, and Yan Yang(杨岩)^1,‡

1 State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

收稿日期:2023-12-27 修回日期:2024-01-24 接受日期:2024-02-05 出版日期:2024-06-18 发布日期:2024-06-18
通讯作者: Zhenrong Sun, Yan Yang E-mail:zrsun@phy.ecnu.edu.cn;yyang@lps.ecnu.edu.cn
基金资助:
The work was partly supported by the National Natural Science Foundation of China (Grant Nos. 12034008, 12250003, and 11727810) and the Program of Introducing Talents of Discipline to Universities 111 Project (B12024).

Manipulating the electron dynamics in the non-sequential double ionization process of Ar atoms by an orthogonal two-color laser field

Pengzhao Wang(王鹏昭)¹, Lijie Qian(钱丽洁)¹, Zhenrong Sun(孙真荣)^1,2,†, and Yan Yang(杨岩)^1,‡

1 State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China;
2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Received:2023-12-27 Revised:2024-01-24 Accepted:2024-02-05 Online:2024-06-18 Published:2024-06-18
Contact: Zhenrong Sun, Yan Yang E-mail:zrsun@phy.ecnu.edu.cn;yyang@lps.ecnu.edu.cn
Supported by:
The work was partly supported by the National Natural Science Foundation of China (Grant Nos. 12034008, 12250003, and 11727810) and the Program of Introducing Talents of Discipline to Universities 111 Project (B12024).

摘要/Abstract

摘要： Electron dynamics during non-sequential double ionization (NSDI) is one of the most attractive areas of research in the field of laser-atom or laser-molecule interaction. Based on the classic two-dimensional model, we study the process of NSDI of argon atoms driven by a few-cycle orthogonal two-color laser field composed of 800nm and 400nm laser pulses. By changing the relative phase of the two laser pulses, a localized enhancement of NSDI yield is observed at 0.5$\pi $ and 1.5$\pi $, which could be attributed to a rapid and substantial increase in the number of electrons returning to the parent ion within extremely short time intervals at these specific phases. Through the analysis of the electron-electron momentum correlations within different time windows of NSDI events and the angular distributions of emitted electrons in different channels, we observe a more pronounced electron-electron correlation phenomenon in the recollision-induced ionization (RII) channel. This is attributed to the shorter delay time in the RII channel.

关键词: non-sequential double ionization, electron dynamics, few-cycle orthogonal two-color laser field

Abstract: Electron dynamics during non-sequential double ionization (NSDI) is one of the most attractive areas of research in the field of laser-atom or laser-molecule interaction. Based on the classic two-dimensional model, we study the process of NSDI of argon atoms driven by a few-cycle orthogonal two-color laser field composed of 800nm and 400nm laser pulses. By changing the relative phase of the two laser pulses, a localized enhancement of NSDI yield is observed at 0.5$\pi $ and 1.5$\pi $, which could be attributed to a rapid and substantial increase in the number of electrons returning to the parent ion within extremely short time intervals at these specific phases. Through the analysis of the electron-electron momentum correlations within different time windows of NSDI events and the angular distributions of emitted electrons in different channels, we observe a more pronounced electron-electron correlation phenomenon in the recollision-induced ionization (RII) channel. This is attributed to the shorter delay time in the RII channel.

Key words: non-sequential double ionization, electron dynamics, few-cycle orthogonal two-color laser field

中图分类号: (Photoionization of atoms and ions)

32.80.Fb

33.20.Xx (Spectra induced by strong-field or attosecond laser irradiation) 33.80.Eh (Autoionization, photoionization, and photodetachment) 34.50.Rk (Laser-modified scattering and reactions)

Pengzhao Wang(王鹏昭), Lijie Qian(钱丽洁), Zhenrong Sun(孙真荣), and Yan Yang(杨岩). Manipulating the electron dynamics in the non-sequential double ionization process of Ar atoms by an orthogonal two-color laser field[J]. 中国物理B, 2024, 33(6): 63201-063201.

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Manipulating the electron dynamics in the non-sequential double ionization process of Ar atoms by an orthogonal two-color laser field

Manipulating the electron dynamics in the non-sequential double ionization process of Ar atoms by an orthogonal two-color laser field

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