中国物理B ›› 2024, Vol. 33 ›› Issue (1): 13301-13301.doi: 10.1088/1674-1056/acd921

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Collision off-axis position dependence of relativistic nonlinear Thomson inverse scattering of an excited electron in a tightly focused circular polarized laser pulse

Yubo Wang(王禹博)1, Qingyu Yang(杨青屿)1, Yifan Chang(常一凡)2, Zongyi Lin(林宗熠)1, and Youwei Tian(田友伟)2,†   

  1. 1 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • 收稿日期:2023-01-17 修回日期:2023-05-23 接受日期:2023-05-26 出版日期:2023-12-13 发布日期:2023-12-13
  • 通讯作者: Youwei Tian E-mail:tianyw@njupt.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10947170/A05 and 11104291), the Natural Science Fund for Colleges and Universities in Jiangsu Province (Grant No. 10KJB140006), the Natural Sciences Foundation of Shanghai (Grant No. 11ZR1441300), and the Natural Science Foundation of Nanjing University of Posts and Telecommunications (Grant No. NY221098). We also thank the Jiangsu Qing Lan Project for their sponsorship.

Collision off-axis position dependence of relativistic nonlinear Thomson inverse scattering of an excited electron in a tightly focused circular polarized laser pulse

Yubo Wang(王禹博)1, Qingyu Yang(杨青屿)1, Yifan Chang(常一凡)2, Zongyi Lin(林宗熠)1, and Youwei Tian(田友伟)2,†   

  1. 1 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • Received:2023-01-17 Revised:2023-05-23 Accepted:2023-05-26 Online:2023-12-13 Published:2023-12-13
  • Contact: Youwei Tian E-mail:tianyw@njupt.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10947170/A05 and 11104291), the Natural Science Fund for Colleges and Universities in Jiangsu Province (Grant No. 10KJB140006), the Natural Sciences Foundation of Shanghai (Grant No. 11ZR1441300), and the Natural Science Foundation of Nanjing University of Posts and Telecommunications (Grant No. NY221098). We also thank the Jiangsu Qing Lan Project for their sponsorship.

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摘要： This paper presents a novel view of the impact of electron collision off-axis positions on the dynamic properties and relativistic nonlinear Thomson inverse scattering of excited electrons within tightly focused, circularly polarized laser pulses of varying intensities. We examine the effects of the transverse ponderomotive force, specifically how the deviation angle and speed of electron motion are affected by the initial off-axis position of the electron and the peak amplitude of the laser pulse. When the laser pulse intensity is low, an increase in the electron's initial off-axis distance results in reduced spatial radiation power, improved collimation, super-continuum phenomena generation, red-shifting of the spectrum's harmonic peak, and significant symmetry in the radiation radial direction. However, in contradiction to conventional understandings, when the laser pulse intensity is relatively high, the properties of the relativistic nonlinear Thomson inverse scattering of the electron deviate from the central axis, changing direction in opposition to the aforementioned effects. After reaching a peak, these properties then shift again, aligning with the previous direction. The complex interplay of these effects suggests a greater nuance and intricacy in the relationship between laser pulse intensity, electron position, and scattering properties than previously thought.

关键词: relativistic nonlinear Thomson inverse scattering, off-axis collision, radiation angle distribution, tightly focused laser pulse

Abstract: This paper presents a novel view of the impact of electron collision off-axis positions on the dynamic properties and relativistic nonlinear Thomson inverse scattering of excited electrons within tightly focused, circularly polarized laser pulses of varying intensities. We examine the effects of the transverse ponderomotive force, specifically how the deviation angle and speed of electron motion are affected by the initial off-axis position of the electron and the peak amplitude of the laser pulse. When the laser pulse intensity is low, an increase in the electron's initial off-axis distance results in reduced spatial radiation power, improved collimation, super-continuum phenomena generation, red-shifting of the spectrum's harmonic peak, and significant symmetry in the radiation radial direction. However, in contradiction to conventional understandings, when the laser pulse intensity is relatively high, the properties of the relativistic nonlinear Thomson inverse scattering of the electron deviate from the central axis, changing direction in opposition to the aforementioned effects. After reaching a peak, these properties then shift again, aligning with the previous direction. The complex interplay of these effects suggests a greater nuance and intricacy in the relationship between laser pulse intensity, electron position, and scattering properties than previously thought.

Key words: relativistic nonlinear Thomson inverse scattering, off-axis collision, radiation angle distribution, tightly focused laser pulse

中图分类号:  (Spectra induced by strong-field or attosecond laser irradiation)

  • 33.20.Xx
03.50.De (Classical electromagnetism, Maxwell equations) 41.75.Jv (Laser-driven acceleration?) 52.38.Ph (X-ray, γ-ray, and particle generation)