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Title: Plasma wave aided two photon decay of an electromagnetic wave in a plasma

The presence of a Langmuir wave in an unmagnetized plasma is shown to allow parametric decay of an electromagnetic wave into two electromagnetic waves, which is otherwise not allowed due to wave number mismatch. The decay occurs at plasma densities below one ninth the critical density and the decay waves propagate at finite angles to the pump laser. Above the threshold, the growth rate scales linearly with the amplitude of the Langmuir wave and the amplitude of the pump electromagnetic wave. The frequency ω of the lower frequency decay wave increases with the angle its propagation vector makes with that of the pump. The growth rate, however, decreases with ω.
Authors:
 [1] ;  [2] ;  [3]
  1. Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)
  2. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)
  3. Indian Institute of Astrophysics, Bangalore 560034 (India)
Publication Date:
OSTI Identifier:
22403252
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 11; Other Information: (c) 2014 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; DECAY; ELECTROMAGNETIC RADIATION; PHOTONS; PLASMA DENSITY; PLASMA WAVES; PUMPS