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Brillouin Instability in Longitudinally Magnetized Crystals with High Dielectric Constant
Author(s) -
Gadkari P.,
Ghosh S.
Publication year - 1992
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.2221720222
Subject(s) - brillouin scattering , dispersion relation , amplitude , polarization (electrochemistry) , brillouin zone , magnetic field , condensed matter physics , optics , dielectric , physics , linear polarization , instability , electromagnetic radiation , electric field , plane wave , laser , mechanics , chemistry , optoelectronics , quantum mechanics
An analytical investigation is made of the stimulated Brillouin Scattering of a plane polarized intense electromagnetic wave propagating parallel to the applied magnetic field in a n‐type semiconducting plasma with high dielectric constant. The general dispersion relation is obtained and solved for both, the cases of scattered electromagnetic waves (i.e. in the case of left hand and right hand circularly polarized waves) to study the threshold condition and the growth rate of the unstable Brillouin mode at a pump amplitude well above the threshold. It is found that the threshold pump amplitude is independent of applied magnetic field and is the same for both types of polarization. The growth rate of the unstable Brillouin mode has linear dependence on the magnetic field. Numerical estimations are made for n‐BaTiO 3 irradiated with a pulsed 10.6 μm CO 2 laser to obtain the necessary electric field.