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Scattering of Laser Light by an Acoustic Wave in Magnetoactive Noncentrosymmetric Semiconducting Crystals
Author(s) -
Jat K. L.,
Ghosh S.
Publication year - 1991
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.2221670137
Subject(s) - scattering , condensed matter physics , magnetic field , laser , piezoelectricity , acoustic wave , semiconductor , physics , light scattering , optics , materials science , atomic physics , optoelectronics , acoustics , quantum mechanics
Abstract Considering that the origin of nonlinear interaction lies in the second order optical susceptibility arising from the nonlinear induced current density and using the coupled mode theory, an analytical investigation of scattering of laser by acoustic wave and the consequent amplification of scattered modes and acoustic wave is carried out in a transversely magnetised semiconductor of noncentrosymmetric nature. The influence of carrier density is also considered. The threshold value of the pump electric field is obtained. E oth is found to decrease with increasing magnetic field and decreasing scattering angle. The steady state growth rates for piezoelectric ( g p ) and deformation potential ( g d ) scattering and both ( g b ) ones are also obtained. The numerical estimations are made for n‐InSb crystals at 77 K. The gain constants are found to be higher in the presence of a strong magnetic field when the cyclotron frequency is near to the pump frequency. The doping level is also found to have a significant influence on the gain constant.