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Chinese Physics, 2005, Vol. 14(9): 1850-1855    DOI: 10.1088/1009-1963/14/9/029
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES Prev   Next  

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 
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
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.
Keywords:  soliton      ultrashort laser pulse      plasma      fluid model  
Received:  15 November 2004      Revised:  26 April 2005      Accepted manuscript online: 
PACS:  52.35.Sb (Solitons; BGK modes)  
  52.65.-y (Plasma simulation)  
  52.38.-r (Laser-plasma interactions)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10335020).

Cite this article: 

Fang Zong-Bao (方宗豹), Shen Bai-Fei (沈百飞), Cheng Chun-Fu (成纯富), Zhang Xiao-Mei (张晓梅) Few-cycle relativistic solitons in plasmas 2005 Chinese Physics 14 1850

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