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Stimulated Brillouin Scattering of Electromagnetic Waves Propagating Obliquely in a Magnetoactive Centrosymmetric Semiconductor Plasma
Author(s) -
Dubey Swati,
Ghosh S.
Publication year - 1993
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.2221800126
Subject(s) - brillouin scattering , optics , scattering , physics , electrostriction , magnetic field , wavelength , semiconductor , condensed matter physics , plasma , laser , optoelectronics , quantum mechanics , piezoelectricity , acoustics
An analytical investigation is made for the stimulated Brillouin scattering (SBS) of an electromagnetic wave propagating obliquely with the externally applied magnetic field, in a centrosymmetric, doped semiconductor plasma. The origin of this nonlinear interaction lies in the third‐order optical susceptibility arising due to the nonlinear current density and electrostriction of the medium. The magnitude of the third‐order nonlinear optical susceptibility determined from our analysis is found to agree with the theoretically and experimentally quoted values. The threshold field for inciting SBS and the corresponding gain constant is also identified. The magnetic field and the obliquity of the pump are found to augment the gain constant. The gain constant is found to increase with the scattering angle and is maximum for the backscattered mode. The transmitted intensity of the scattered mode and Brillouin cell efficiency have also been deduced when the cell length is quite large compared to the pump wavelength. The cell efficiency is found to be maximum when the magnetic field is applied across the propagation direction. The analysis established the possibility of optical phase conjugation in a semiconductor plasma and the corresponding threshold cell length is found to be of the order of nm.