Abstract
AbstractAn analytical investigation is made of the stimulated Brillouin scattering of a large amplitude, transversely polarized, electromagnetic pump wave produced by both, an electron‐plasma wave and acoustical phonon vibrations in a magnetoactive n‐type moderately piezoelectric semiconductor. Using the hydrodynamical model of plasma, the general dispersion relation is obtained in the presence of a large magnetostatic field applied at an arbitrary angle θ to the direction of propagation of the pump wave. The analysis is applied to both the cases of isotropic (B0 = 0) and magnetoactive (B0 ± 0) plasmas. The threshold electric field necessary for the onset of Brillouin instability and the growth rate of the unstable Brillouin mode well above the threshold are studied. It is concluded that the threshold pump amplitude as well as the growth rate are strongly dependent on the orientation of the magnetostatic field with respect to the directions and magnitudes of the wave vectors k and k1 of the acoustic and scattered electromagnetic waves, respectively.
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