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Raman-scattering selection rules for surface polaritons have been studied by experiments using a thin ({≈} 20 {μ}m) single-crystal slab of GaP of known orientation. The dispersion of the observed mode has been determined by varying the scattering angle, and comparison is made with the theoretically predicted dispersion of surface polaritons at the surface of a semi-infinite GaP crystal. The observed selection rules are consistent with the results of an analysis using the bulk Raman tensors.
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Valdez et al. (1977) studied this question.
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