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An investigation is made of Brillouin scattering of acoustoelectric domains in semicon-duzting ZnO and CdS, in the case where the crystal is oriented with the electric drift field parallel to the hexagonal axis. The domains consist of off-axis shear waves. Angular dispersion due to strong elastic anisotropy is studied, and it is shown that the angle of maximum gain depends on the applied voltage and is limited by the sample geometry. The development of the angular spectrum for several acoustic frequencies is determined. The frequency spectrum of the domain is dominated by frequencies well below the frequency of maximum linear gian.
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O. Keller (1971) studied this question.
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