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Generation of THz Radiation by Laser Plasma Interaction
Author(s) -
Singh M.,
Sharma R. P.
Publication year - 2013
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201300006
Subject(s) - terahertz radiation , physics , plasma , laser , amplitude , waves in plasmas , instability , magnetic field , electromagnetic radiation , atomic physics , optics , coupling (piping) , parametric statistics , computational physics , materials science , nuclear physics , quantum mechanics , metallurgy , statistics , mathematics
This paper presents the three wave parametric decay process to generate the Terahertz (THz) radiations in magnetized plasma. The pump wave (Laser beam) is considered in the extraordinary mode (x‐mode), propagating perpendicular to the background magnetic field. This pump wave decays into an upper hybrid wave and a THz wave which is in magnetosonic mode. The appropriate expressions for the coupling coefficients of the threewave interaction and THz wave amplitude have been derived. Subsequently, the growth rate of this decay instability is also calculated. Various laser and plasma parameters were optimized and we report efficiency of the order of ∼1.4 × 10 –2 for current scheme. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)