Reflectivity spectra of monocrystalline CdxHg1-xTe as a function of composition and temperature

Fundamental reflectivity spectra of Cd x Hg 1-x Te in the 1.7-8.5 eV energy range have been investigated as a function of temperature and Cd concentration. The thermal coefficients versus composition x for several observed maxima E 1 , E 1 + Delta 1 , E 2 , A and B and thresholds e 1 , e 1 + Delta 1 , E a , E b have been determined. On the basis of these results and published theoretical and experimental data an identification of the analysed transitions have been proposed.