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Thursday, April 28, 2016
Abstract-Demonstration of coherent terahertz transition radiation from relativistic laser-solid interactions
Guo-Qian Liao, Yu-Tong Li, Yi-Hang Zhang, Hao Liu, Xu-Lei Ge, Su Yang, Wen-Qing Wei, Xiao-Hui Yuan, Yan-Qing Deng, Bao-Jun Zhu, Zhe Zhang, Wei-Min Wang, Zheng-Ming Sheng, Li-Ming Chen, Xin Lu, Jing-Long Ma, Xuan Wang, and Jie Zhang
https://journals.aps.org/prl/accepted/64073Y26Ac61c24186100044b132eaa55a298f122
Coherent transition radiation in the terahertz (THz) region with energies of sub-mJ/pulse has been demonstrated by relativistic laser-driven electron beams crossing the solid-vacuum boundary. Targets including mass-limited foils and layered metal-plastic targets are used to verify the radiation mechanism and characterize the radiation properties. Observations of THz emissions as a function of target parameters agree well with the formation-zone and diffraction model of transition radiation. Particle-in-cell simulations also well reproduce the observed characteristics of THz emissions. The present THz transition radiation enables not only a potential tabletop brilliant THz source, but also a novel noninvasive diagnostic for fast electron generation and transport in laser-plasma interactions.
Labels:
Bao-Jun Zhu,
Guo-Qian Liao,
Hao Liu,
Li-Ming Chen,
Su Yang,
Wei-Min Wang,
Wen-Qing Wei,
Xiao-Hui Yuan,
Xin Lu,
Xu-Lei Ge,
Yan-Qing Deng,
Yi-Hang Zhang,
Yu-Tong Li,
Zhe Zhang,
Zheng-Ming Sheng
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