Terahertz generation by two cross focused laser beams in collisional plasmas

The role of two cross-focused spatial-Gaussian laser beams has been studied for the high power and efficient terahertz (THz) radiation generation in the collisional plasma. The nonlinear current at THz frequency arises on account of temperature dependent collision frequency of electrons with ions in...

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Bibliographic Details
Published in:Physics of plasmas 2014-07, Vol.21 (7)
Main Authors: Sharma, R. P., Singh, Ram Kishor
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BEAMS
COLLISIONAL PLASMA
Collisional plasmas
COLLISIONS
CURRENTS
ELECTRIC FIELDS
ELECTRONS
Gaussian beams (optics)
Laser beams
LASERS
NONLINEAR PROBLEMS
OPTIMIZATION
Plasma
Plasma physics
TEMPERATURE DEPENDENCE
Terahertz frequencies
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Summary:The role of two cross-focused spatial-Gaussian laser beams has been studied for the high power and efficient terahertz (THz) radiation generation in the collisional plasma. The nonlinear current at THz frequency arises on account of temperature dependent collision frequency of electrons with ions in the plasma and the presence of a static electric field (applied externally in the plasma) and density ripple. Optimisation of laser-plasma parameters gives the radiated THz power of the order of 0.23  MW.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4887537