Abstract
The Brillouin spectrum of diamond excited with either the or He-Ne laser radiation is measured with a triple-passed piezoelectrically scanned Fabry-Perot interferometer. The polarization features and the selection rules have been verified for a number of scattering geometries. From the measured frequency shifts of the Brillouin components, the following values are obtained for the elastic moduli: , , and in units of dyn/. The relative intensities of the observed Brillouin components for a variety of scattering geometries are consistent with the following elasto-optic contants: and determined by Denning et al. and obtained by Schneider. From a comparison of the Brillouin spectrum and the Raman spectrum associated with the zone-center optical phonon, observed under identical conditions, we obtain a value for the single independent component characterizing the Raman tensor per unit cell, viz., .
- Received 16 December 1974
DOI:https://doi.org/10.1103/PhysRevB.11.3139
©1975 American Physical Society