Elastic and photoelastic constants of ZnTe measured by Brillouin scattering

The elastic and photoelastic constants of ZnTe crystals have been determined from Brillouin scattering spectra with 90 degrees -scattering geometry at room temperature. From the measured frequency shifts of the Brillouin doublets, the following values are obtained for the elastic constants: C₁₁=7.22+or-0.02, C₁₂=4.09+or-0.06 and C₄₄=3.080.03 in units of 10¹⁰ N m^-2. From the comparison of the absolute intensities of the Brillouin doublets measured in ZnTe with that in fused quartz whose photoelastic constants are well-known, the following values are determined for the photoelastic constants: P₁₁=0.144+or-0.007, P₁₂=0.094+or-0.005 and P₄₄=0.046+or-0.003.