Far infrared optical properties of selenium and cadmium telluride.

The optical constants of Se and CdTe have been measured in the far ir from 10 cm(-1) to 100 cm(-1) using Fourier transform spectroscopy. An oscillator model has been fit to the available data for both materials over the entire ir range from 10 cm(-1) to 10,000 cm(-1). Several three-phonon absorption peaks have been observed and identified in the absorption spectra of Se. The linear optical properties of these important ir materials have been summarized throughout the ir region.