中国物理B ›› 2011, Vol. 20 ›› Issue (9): 95204-095204.doi: 10.1088/1674-1056/20/9/095204

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Effects of electron temperature on dielectric function and localization of laser beams in underdense collisional plasma

蔡泽彬1, 夏雄平2, 易林2   

  1. (1)Department of Basis, Air Force Radar Academy, Wuhan 430019, China; (2)Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2010-10-27 修回日期:2011-04-19 出版日期:2011-09-15 发布日期:2011-09-15

Effects of electron temperature on dielectric function and localization of laser beams in underdense collisional plasma

Xia Xiong-Ping(夏雄平)a), Cai Ze-Bin(蔡泽彬) b), and Yi Lin(易林)a)†   

  1. a Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; b Department of Basis, Air Force Radar Academy, Wuhan 430019, China
  • Received:2010-10-27 Revised:2011-04-19 Online:2011-09-15 Published:2011-09-15

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摘要： Effects of electron temperature on dielectric function and localization of laser beams in underdense collisional plasmas are investigated. Simulation results show that the electron temperature has a strong effect on the dielectric constant and the laser beam localization. It is observed that due to the influence of the electron temperature, the dielectric function presents some interesting and complicated nonlinear variations, and gives rise to the laser beam localization. Moreover, the amplitudes of the beam width and the beam intensity are subjected to continuously oscillatory variation in the region of localization. In addition, the effects of several parameters on the dielectric function and the beam localization are discussed.

关键词: underdense collisional plasmas, electron temperature, dielectric function, laser beam localization

Abstract: Effects of electron temperature on dielectric function and localization of laser beams in underdense collisional plasmas are investigated. Simulation results show that the electron temperature has a strong effect on the dielectric constant and the laser beam localization. It is observed that due to the influence of the electron temperature, the dielectric function presents some interesting and complicated nonlinear variations, and gives rise to the laser beam localization. Moreover, the amplitudes of the beam width and the beam intensity are subjected to continuously oscillatory variation in the region of localization. In addition, the effects of several parameters on the dielectric function and the beam localization are discussed.

Key words: underdense collisional plasmas, electron temperature, dielectric function, laser beam localization

中图分类号:  (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))

  • 52.35.Mw
42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation) 52.25.Mq (Dielectric properties)