INFRA-RED ABSORPTION OF BERYLLIUM IN CADMIUM TELLURIDE .I.

The local vibrational mode of Be in CdTe has been investigated. The fundamental of the local mode occurs at 391 cm-1 at 4°K. The second and two third harmonics of the local mode have also been measured. Side bands on the local-mode fundamental due to simultaneous excitation of local and lattice vibrational modes are described. The effect of temperature on the local-mode intensity has been measured. The peak positions of the local-mode lines are found to shift to lower energy and the linewidths to increase with increasing temperature. The causes of the temperature-dependent effects in the local-mode spectrum are discussed.