Two‐Phonon Infrared Absorption in CdSexTe1−x Mixed Crystals

Abstract
The transmission spectra of CdSexTe1−x(0 ≦ x ≦ 1) mixed crystals have been measured in the spectral range 250 to 400 cm−1 at room temperature. Eleven absorption bands are observed and ascribed to particular two‐phonon combinations. The composition dependence of short‐wavelength optical phonon frequencies (from the edge of the Brillouin zone) is determined.