Photoelastic and surface-corrugation contributions to Brillouin scattering from an opaque crystal
- 15 October 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 18 (8), 4181-4199
- https://doi.org/10.1103/physrevb.18.4181
Abstract
We present a theory of the Brillouin scattering of light from long-wavelength acoustical phonons in an opaque crystal which takes into account the effects associated with a finite skin depth. The theory incorporates the photoelastic back scattering of the penetrating light, the effect of the thermal elastic strain induced surface corruga ion on the reflected light, as well as the interference between the two scattering processes. We relate the scattering cross section to the spectral density of the elastic-strain fluctuations in the materials, which we construct from the relevant classical elastic Green's functions for a semi-infinite elastic medium bounded by a stress-free surface. We present representative computed line shapes and compare the relative strengths of the different contributions to the spectra for various angles of incidence.Keywords
This publication has 20 references indexed in Scilit:
- Theory of Surface-Ripple Brillouin Scattering by SolidsPhysical Review Letters, 1978
- Brillouin scattering from isotropic metalsPhysical Review B, 1976
- Theory of the Brillouin scattering lineshape in an opaque materialJournal of Physics C: Solid State Physics, 1976
- Surface contribution to the low-temperature specific heat of a hexagonal crystalPhysical Review B, 1976
- Surface Plasmon and Polariton Dispersion at Rough BoundariesPhysica Status Solidi (b), 1976
- Integral equation treatment of scattering from rough surfacesPhysical Review B, 1976
- Light scattering from semi-infinite media for non-normal incidencePhysical Review B, 1975
- Structure in the Brillouin Spectra of Thin FilmsPhysical Review Letters, 1972
- Brillouin-Scattering Measurements on Silicon and GermaniumPhysical Review Letters, 1972
- Theory of the Raman effect in metalsAnnals of Physics, 1970