Investigations of optical and thermal properties of surface layers of Cd1-x Bex Te samples by the photoacoustic method

The work presents the results of a research on the photoacoustic spectra of thin surface layers of Cd 1-x Be x Te crystals formed by grinding and polishing their surfaces. As a result of matching the theoretical and experimental photoacoustic spectra, thermal and optical parameters of these layers were determined. Thermal parameters of the surface layers, such as thermal conductivity and thermal diffusivity, turned out to be much worse than the analogous parameters of the substrate. The increase in the optical absorption of surface layers for photon energies below E g was also determined.