ELECTROOPTIC COEFFICIENT SPECTRUM OF CADMIUM TELLURIDE

A spectrum for the electro-optic coefficient of cadmium telluride meas ured from 3 to 14 mu m is reported. The spectrum shows that the quanti ty n(3)r(41) has a nearly constant value of 1.09 x 10(-10) m/V over th is spectral band, with a slight (5%) dip at the weak absorption band c entered at 6 mu m. Measurements were performed with an infrared Muelle r matrix spectropolarimeter. Transmission spectra of the Mueller matri x were acquired at a set of applied voltages. Retardance spectra were calculated from Mueller matrix spectra, and then the electro-optic coe fficient was calculated at each wavelength by a least-squares fit to t he resulting retardance as a function of voltage.