Abstract
Based on the intrinsic absorption spectra of Hg 1- x Cd x Te performed on thin films of Hg 1- x Cd x Te bulk material with x ranging from 0.170 to 0.443 and at temperatures from 4.2 to 300 K, the expressions for the intrinsic optical absorption coefficient in the Kane region are reviewed. The results show that the energy dependence of the absorption coefficient above the absorption edge obeys an exponential law rather than a square-root law. Furthermore, it seems that the absorption behavior of the epitaxial film in the Kane region also follows the exponential absorption law.
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