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Title: Laser driven terahertz generation in hot plasma with step density profile

An analytical formalism of terahertz (THz) radiation generation by beating of two lasers in a hot plasma with step density profile is developed. The lasers propagate obliquely to plasma surface normal, and the nonlinearity arises through the ponderomotive force. The THz is emitted in the specular reflection direction, and the yield is enhanced due to coupling with the Langmuir wave when the plasma frequency is close to THz frequency. The power conversion efficiency maximizes at an optimum angle of incidence.
Authors:
;  [1] ;  [2]
  1. Center for Quantum-Beam-based Radiation Research, Korea Atomic Energy Research Institute, Daejeon 305-353 (Korea, Republic of)
  2. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)
Publication Date:
OSTI Identifier:
22410450
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANALYTIC FUNCTIONS; EFFICIENCY; ENERGY CONVERSION; HOT PLASMA; INCIDENCE ANGLE; LANGMUIR FREQUENCY; LASERS; NONLINEAR PROBLEMS; PLASMA DENSITY; PONDEROMOTIVE FORCE; REFLECTION; THZ RANGE