中国物理B ›› 2005, Vol. 14 ›› Issue (9): 1850-1855.doi: 10.1088/1009-1963/14/9/029

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Few-cycle relativistic solitons in plasmas

方宗豹1, 成纯富1, 张晓梅1, 沈百飞2   

  1. (1)State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences,Shanghai 201800, China;Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; (2)State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800, China
  • 收稿日期:2004-11-15 修回日期:2005-04-26 出版日期:2005-09-20 发布日期:2005-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10335020).

Few-cycle relativistic solitons in plasmas

Fang Zong-Bao (方宗豹)ab, Shen Bai-Fei (沈百飞)a, Cheng Chun-Fu (成纯富)ab, Zhang Xiao-Mei (张晓梅)ab    

  1. a State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, Chinab Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
  • Received:2004-11-15 Revised:2005-04-26 Online:2005-09-20 Published:2005-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10335020).

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摘要： A set of exact one-dimensional solutions to coupled nonlinear equations describing the propagation of a relativistic ultrashort circularly polarized laser pulse in a cold collisionless and bounded plasma where electrons have an initial velocity in the laser propagating direction is presented. The solutions investigated here are in the form of quickly moving envelop solitons at a propagation velocity comparable to the light speed. The features of solitons in both underdense and overdense plasmas with electrons having different given initial velocities in the laser propagating direction are described. It is found that the amplitude of solitons is larger and soliton width shorter in plasmas where electrons have a larger initial velocity. In overdense plasmas, soliton duration is shorter, the amplitude higher than that in underdense plasmas where electrons have the same initial velocity.

关键词: soliton, ultrashort laser pulse, plasma, fluid model

Abstract: A set of exact one-dimensional solutions to coupled nonlinear equations describing the propagation of a relativistic ultrashort circularly polarized laser pulse in a cold collisionless and bounded plasma where electrons have an initial velocity in the laser propagating direction is presented. The solutions investigated here are in the form of quickly moving envelop solitons at a propagation velocity comparable to the light speed. The features of solitons in both underdense and overdense plasmas with electrons having different given initial velocities in the laser propagating direction are described. It is found that the amplitude of solitons is larger and soliton width shorter in plasmas where electrons have a larger initial velocity. In overdense plasmas, soliton duration is shorter, the amplitude higher than that in underdense plasmas where electrons have the same initial velocity.

Key words: soliton, ultrashort laser pulse, plasma, fluid model

中图分类号:  (Solitons; BGK modes)

  • 52.35.Sb
52.65.-y (Plasma simulation) 52.38.-r (Laser-plasma interactions)