中国物理B ›› 2023, Vol. 32 ›› Issue (12): 124205-124205.doi: 10.1088/1674-1056/acd3dd

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Laser parameters affecting the asymmetric radiation of the electron in tightly focused intense laser pulses

Xing-Yu Li(李星宇)1, Wan-Yu Xia(夏婉瑜)2, You-Wei Tian(田友伟)3,†, and Shan-Ling Ren(任山令)3   

  1. 1 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 College of Management, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    3 College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • 收稿日期:2022-12-18 修回日期:2023-04-13 接受日期:2023-05-10 出版日期:2023-11-14 发布日期:2023-11-22
  • 通讯作者: You-Wei 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), Natural Science Fund for Colleges and Universities in Jiangsu Province (Grant No.10KJB140006), Natural Science Foundation of Shanghai (Grant No.11ZR1441300), and Natural Science Foundation of Nanjing University of Posts and Telecommunications (Grant No.NY221098), and sponsored by the Jiangsu Qing Lan Project and STITP Project (Grant No.CXXYB2022516).

Laser parameters affecting the asymmetric radiation of the electron in tightly focused intense laser pulses

Xing-Yu Li(李星宇)1, Wan-Yu Xia(夏婉瑜)2, You-Wei Tian(田友伟)3,†, and Shan-Ling Ren(任山令)3   

  1. 1 Bell Honors School, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 College of Management, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    3 College of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • Received:2022-12-18 Revised:2023-04-13 Accepted:2023-05-10 Online:2023-11-14 Published:2023-11-22
  • Contact: You-Wei 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), Natural Science Fund for Colleges and Universities in Jiangsu Province (Grant No.10KJB140006), Natural Science Foundation of Shanghai (Grant No.11ZR1441300), and Natural Science Foundation of Nanjing University of Posts and Telecommunications (Grant No.NY221098), and sponsored by the Jiangsu Qing Lan Project and STITP Project (Grant No.CXXYB2022516).

摘要: The nonlinear radiation of the electron is a distinctive feature of the action of tightly focused linearly polarized lasers. In this paper, from the perspective of radiation symmetry, the effect of laser parameters on the electron radiation power in the time domain is studied systematically. An asymmetric bimodal structure is found in the time domain in the direction of the maximum radiation. For this special structure, an explanation is given based on the electron dynamics perspective. The structure is compared with the symmetric bimodal structure in the classical theory. The increase in laser intensity, while significantly increasing the radiated power of the electron, exacerbates the asymmetry of the electron radiation. The variation in the initial phase of the laser leads to a periodic variation in the electron motion, which results in a periodic extension of the electron spatial radiation with a period of π. Moreover, the existence of jump points with a phase difference of π in the range of 0-2π is found. The increase in pulse width reduces the radiated power, extends the radiation range, and alleviates the radiation asymmetry. The results in this paper contribute to the study of electron radiation characteristics in intense laser fields.

关键词: laser optics, nonlinear Thomson scattering, tightly focused laser, asymmetric radiation

Abstract: The nonlinear radiation of the electron is a distinctive feature of the action of tightly focused linearly polarized lasers. In this paper, from the perspective of radiation symmetry, the effect of laser parameters on the electron radiation power in the time domain is studied systematically. An asymmetric bimodal structure is found in the time domain in the direction of the maximum radiation. For this special structure, an explanation is given based on the electron dynamics perspective. The structure is compared with the symmetric bimodal structure in the classical theory. The increase in laser intensity, while significantly increasing the radiated power of the electron, exacerbates the asymmetry of the electron radiation. The variation in the initial phase of the laser leads to a periodic variation in the electron motion, which results in a periodic extension of the electron spatial radiation with a period of π. Moreover, the existence of jump points with a phase difference of π in the range of 0-2π is found. The increase in pulse width reduces the radiated power, extends the radiation range, and alleviates the radiation asymmetry. The results in this paper contribute to the study of electron radiation characteristics in intense laser fields.

Key words: laser optics, nonlinear Thomson scattering, tightly focused laser, asymmetric radiation

中图分类号:  (Lasers)

  • 42.55.-f
41.60.Cr (Free-electron lasers) 42.65.-k (Nonlinear optics) 42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)