中国物理B ›› 2008, Vol. 17 ›› Issue (3): 1050-1054.doi: 10.1088/1674-1056/17/3/050

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Intense Cherenkov-type terahertz electromagnetic radiation from ultrafast laser--plasma interaction

刘世炳1, 李维1, 胡强林2   

  1. (1)Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China; (2)Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China；Department of Physics, Jinggangshan University, Ji'an 343009, China
  • 收稿日期:2006-10-24 修回日期:2007-09-18 出版日期:2008-03-04 发布日期:2008-03-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China(Grant No 10574010).

Intense Cherenkov-type terahertz electromagnetic radiation from ultrafast laser--plasma interaction

Hu Qiang-Lin(胡强林)a)b), Liu Shi-Bing(刘世炳)a)†, and Li Wei(李维)a)   

  1. a Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China; b Department of Physics, Jinggangshan University, Ji'an 343009, China
  • Received:2006-10-24 Revised:2007-09-18 Online:2008-03-04 Published:2008-03-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China(Grant No 10574010).

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摘要： A Cherenkov-type terahertz electromagnetic radiation is revealed, which results efficiently from the collective effects in the time-domain of ultrafast pulsed electron current produced by ultrafast intense laser--plasma interaction. The emitted pulse waveform and spectrum, and the dependence of laser pulse parameters on the structure of the radiation field are investigated numerically. The condition of THz radiation generation in this regime and Cherenkov geometry of the radiation field are studied analytically.

关键词: terahertz radiation, Cherenkov, ultrashort pulse laser, plasma

Abstract: A Cherenkov-type terahertz electromagnetic radiation is revealed, which results efficiently from the collective effects in the time-domain of ultrafast pulsed electron current produced by ultrafast intense laser--plasma interaction. The emitted pulse waveform and spectrum, and the dependence of laser pulse parameters on the structure of the radiation field are investigated numerically. The condition of THz radiation generation in this regime and Cherenkov geometry of the radiation field are studied analytically.

Key words: terahertz radiation, Cherenkov, ultrashort pulse laser, plasma

中图分类号:  (Emission, absorption, and scattering of electromagnetic radiation ?)

  • 52.25.Os
52.38.-r (Laser-plasma interactions)