• High Power Laser Science and Engineering
  • Vol. 2, Issue 1, 010000e7 (2014)
Yue Liu1, Wei-Min Wang2, and Zheng-Ming Sheng1、3、†、*
Author Affiliations
  • 1Key Laboratory for Laser Plasmas (MoE) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, China
  • 2Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing, China
  • 3Department of Physics, SUPA, Strathclyde University, Rottenrow 107, Glasgow, UK
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    Abstract

    It is demonstrated by simulations and analysis that a wakefield driven by an ultrashort intense laser pulse in underdense plasma can emit tunable electromagnetic radiation along the laser propagation direction. The profile of such a kind of radiation is closely associated with the structure of the laser wakefield. In general, electromagnetic radiation in the terahertz range with its frequency a few times the electron plasma frequency can be generated in the moderate intensity regime. In the highly nonlinear case, a chain of radiation pulses is formed corresponding to the nonlinear structure of the wake. Study shows that the radiation is associated with the self-modulation process of the laser pulse in the wakefield and resulting transverse electron momenta from modulated asymmetric laser fields.
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    Yue Liu, Wei-Min Wang, Zheng-Ming Sheng. Electromagnetic radiation from laser wakefields in underdense plasma[J]. High Power Laser Science and Engineering, 2014, 2(1): 010000e7
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    Received: Feb. 14, 2014
    Accepted: Feb. 19, 2014
    Published Online: Dec. 3, 2018
    The Author Email: Zheng-Ming Sheng (zmsheng@sjtu.edu.cn)