Terahertz radiation generation by beating two obliquely incident lasers on a plasma with density gradient

Terahertz excitation by beating two collinear lasers, propagating at an angle to density gradient in plasma, is investigated. The lasers exert a ponderomotive force on electrons that creates beat frequency current density J NL with V×J NL ≠0. This excites electromagnetic radiation. For a parabolic d...

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Bibliographic Details
Main Author: Parashar, Jetendra
Format: Conference Proceeding
Language:English
Subjects:
Current density
Laser beams
Laser excitation
Laser theory
Plasma density
Online Access:Request full text
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Summary:Terahertz excitation by beating two collinear lasers, propagating at an angle to density gradient in plasma, is investigated. The lasers exert a ponderomotive force on electrons that creates beat frequency current density J NL with V×J NL ≠0. This excites electromagnetic radiation. For a parabolic density profile with density peak slightly less than the critical density, the beat wave amplitude acquires large values near the density peak and saturates.
ISSN:2162-2027
DOI:10.1109/IRMMW-THz.2014.6956326