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Effect of Relativistic Mass Variation of the Electron on the Modulational Instability of Laser Beams in Transversely Magnetised Piezoelectric Semiconducting Plasmas
Author(s) -
Ghosh S.,
Dixit S.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221300121
Subject(s) - modulational instability , physics , instability , electron , plasma , quantum electrodynamics , magnetic field , laser , electric field , weibel instability , atomic physics , optics , mechanics , quantum mechanics
The effect is considered of relativistic mass variation of the electron and a large transverse magnetostatic field on the modulational instability of a laser beam and consequent amplification of acoustic waves. The analysis is based on the hydrodynamic model of a plasma in the collision dominated regime. Using coupled‐mode theory the modulational instability in the medium is investigated and the threshold value of the pump electric field and the conditions of the initial growth rates of unstable acoustic waves are deduced. It is found that the condition of instability gets modified due to the presence of the relativistic mass variation. Numerical estimations are made for n‐InSb at 77 K.