Abstract
Mandelstamm-Brillouin (MB) surface light-scattering spectra of (110)-cut GaAs, InSb, and PbS crystals were studied and surface wave velocities were determined for various θ (110) values; θ (110) is the angle between the [001] direction and the plane of the incident light. Both GaAs and InSb crystals demonstrated a considerable GSW high-frequency one-sided line broadening for θ (110)=40°–45°. Observations made for a PbS crystal revealed a GSW-pseudo surface mode (PSM) transition at θ (110)=70°–80 °.
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