Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields

doi:10.1088/1674-1056/ab928c

中国物理B ›› 2020, Vol. 29 ›› Issue (9): 93202-093202.doi: 10.1088/1674-1056/ab928c

Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields

Tong-Tong Xu(徐彤彤), Lian-Lian Zhang(张莲莲), Zhao Jin(金钊), Wei-Jiang Gong(公卫江)

College of Sciences, Northeastern University, Shenyang 110819, China

收稿日期:2020-03-31 修回日期:2020-04-28 接受日期:2020-05-13 出版日期:2020-09-05 发布日期:2020-09-05
通讯作者: Tong-Tong Xu E-mail:xutongtong@mail.neu.edu.cn
基金资助:
Project supported by the China Postdoctoral Science Foundation (Grant No. 2019M661108) and the Fundamental Research Funds for the Central Universities, China (Grant No. N2005023).

Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields

Tong-Tong Xu(徐彤彤), Lian-Lian Zhang(张莲莲), Zhao Jin(金钊), Wei-Jiang Gong(公卫江)

College of Sciences, Northeastern University, Shenyang 110819, China

Received:2020-03-31 Revised:2020-04-28 Accepted:2020-05-13 Online:2020-09-05 Published:2020-09-05
Contact: Tong-Tong Xu E-mail:xutongtong@mail.neu.edu.cn
Supported by:
Project supported by the China Postdoctoral Science Foundation (Grant No. 2019M661108) and the Fundamental Research Funds for the Central Universities, China (Grant No. N2005023).

摘要/Abstract

摘要： With the semiclassical ensemble model, we explore the relative phase-dependent nonsequential double ionization (NSDI) of Mg by counter-rotating two-color circularly polarized (TCCP) laser pulses. The yield of Mg²⁺ sensitively depends on the relative phase Δφ and the intensity of TCCP laser fields. At Δφ=1.5π, the yield of Mg²⁺ exhibits a pronounced peak in the 0.05 PW/cm² laser field. This behavior results from the increase of the initial transverse velocity compensating for the drift velocity with the decreasing angle by analyzing the angular distributions of the electron pairs in four relative phases. By changing the relative phases, we find that the recollision excitation with subsequent ionization and the recollision-impact ionization mechanisms can be controlled with TCCP laser fields.

关键词: nonsequential double ionization, relative phases, two-electron emission dynamics

Abstract: With the semiclassical ensemble model, we explore the relative phase-dependent nonsequential double ionization (NSDI) of Mg by counter-rotating two-color circularly polarized (TCCP) laser pulses. The yield of Mg²⁺ sensitively depends on the relative phase Δφ and the intensity of TCCP laser fields. At Δφ=1.5π, the yield of Mg²⁺ exhibits a pronounced peak in the 0.05 PW/cm² laser field. This behavior results from the increase of the initial transverse velocity compensating for the drift velocity with the decreasing angle by analyzing the angular distributions of the electron pairs in four relative phases. By changing the relative phases, we find that the recollision excitation with subsequent ionization and the recollision-impact ionization mechanisms can be controlled with TCCP laser fields.

Key words: nonsequential double ionization, relative phases, two-electron emission dynamics

中图分类号: (Multiphoton ionization and excitation to highly excited states)

32.80.Rm

42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation)

徐彤彤, 张莲莲, 金钊, 公卫江. Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields[J]. 中国物理B, 2020, 29(9): 93202-093202.

Tong-Tong Xu(徐彤彤), Lian-Lian Zhang(张莲莲), Zhao Jin(金钊), Wei-Jiang Gong(公卫江). Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields[J]. Chin. Phys. B, 2020, 29(9): 93202-093202.

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Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields

Relative phase-dependent two-electron emission dynamics with two-color circularly polarized laser fields

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