CD1-XFEXSE ROOM-TEMPERATURE REFLECTIVITY IN THE 10-25 EV ENERGY-RANGE

The reflectivity spectra of Cd1-xFexSe (x = 0, 0.07 and 0.14) have bee n measured in the energy range 10-25 eV and structures have been assig ned to transitions from the Cd 4d and Se 5s states to the conduction b ands. The assignment has been supported by theoretical ab-initio calcu lations of the band structure and the optical properties of pure hypot hetical zinc blende CdSe. The band structure and the density of states have been obtained using the self-consistent relativistic LMTO method . The theoretical spectrum has been calculated with the inclusion of k -dependent transition matrix elements. The energy shifts of the maxima as die Fe concentration increases have been discussed.