Temperature and Pressure Dependence of the Index of Refraction of CdS

By transmission measurements on CdS platelets the locations of interference maxima were determined between the absorption edge and 6500 Å for E⊥C and E∥C. As temperature and pressure around the sample were changed the displacement of these maxima was followed. Subsequently the dispersion curves were established. The temperatures were varied between 4.2° and 358°K at atmospheric pressure and between 77° and 358°K at hydrostatic pressures up to 10 kbar. The quantities dn⊥/dλ and dn∥/dλ which might be useful for laser applications are presented.