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Electromagnetic radiation at the electron plasma wave frequency by an intense laser pulse interacting with low-density plasmas

Published online by Cambridge University Press:  20 December 2006

LONG LI ,
BAIWEN LI ,
S. ISHIGURO  and
M. SONG
LONG LI
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
BAIWEN LI
Affiliation:
Institute of Applied Physics and Computational Mathematics, Beijing, People's Republic of China
S. ISHIGURO
Affiliation:
National Institute for Fusion Science, Toki 509-5292, Gifu, Japan
M. SONG
Affiliation:
Department of Physics, College of Science, China Agricultural University, People's Republic of China
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Abstract

The generation of low-frequency radiation at around the terahertz frequency, caused by a linearly polarized intense laser pulse passing through a low-density homogeneous plasma, is studied by one-dimensional particle simulations. The excited transverse current component with its frequency at the electron plasma frequency serves as a radiation source to generate electromagnetic waves both in the front and the rear side vacuum regions of the plasma layer. It is found that the electromagnetic radiation fields increase with both increasing plasma density and increasing laser amplitude.

Type
Papers
Information
Journal of Plasma Physics , Volume 72 , Issue 6 , December 2006 , pp. 1303 - 1307
Copyright
2006 Cambridge University Press

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