Optical diagnostics of Cd_xHg_1-xTe solid solutions at nanopulsed laser irradiation

Optical diagnostics of laser-induced processes in Cd_xHg_1-xTe solid solutions has been carried out. Samples were irradiated by ruby laser pulses. Time-resolved reflectivity measurements were executed at wavelengths 1.06 and 0.53 μm. The laser-induced melting thresholds and melt durations are established. Reflectivity dynamics is mainly determined by temperature dependence of reflectivity and interference effects which arise under reflection of probing beam from molten film –solid substrate Structure of the samples Cd_xHg_1-xTe were investigated by Raman scattering. It was shown laser irradiation results in appearance new bands in the RS spectra, which associated with formation of Te precipitates at the surface. (authors)