Intense Cherenkov-type terahertz electromagnetic radiation from ultrafast laser--plasma interaction
Hu Qiang-Lin(胡强林)a)b), Liu Shi-Bing(刘世炳)a)†, and Li Wei(李维)a)
a Institute of Laser Engineering, Beijing University of Technology, Beijing 100022, China; b Department of Physics, Jinggangshan University, Ji'an 343009, China
Abstract A Cherenkov-type terahertz electromagnetic radiation is revealed, which results efficiently from the collective effects in the time-domain of ultrafast pulsed electron current produced by ultrafast intense laser--plasma interaction. The emitted pulse waveform and spectrum, and the dependence of laser pulse parameters on the structure of the radiation field are investigated numerically. The condition of THz radiation generation in this regime and Cherenkov geometry of the radiation field are studied analytically.
Received: 24 October 2006
Revised: 18 September 2007
Accepted manuscript online:
PACS:
52.25.Os
(Emission, absorption, and scattering of electromagnetic radiation ?)
Fund: Project
supported by the National Natural Science Foundation of
China(Grant No 10574010).
Cite this article:
Hu Qiang-Lin(胡强林), Liu Shi-Bing(刘世炳), and Li Wei(李维) Intense Cherenkov-type terahertz electromagnetic radiation from ultrafast laser--plasma interaction 2008 Chin. Phys. B 17 1050
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