Reflectivity Measurements of Single Crystal CdIn2S4 at Room Temperature

The optical reflectivity spectrum of CdIn2S4 is obtained in the photon energy range from 1.549 eV (8,000 Å) to 4.132 eV (3,000 Å). A peak and a shoulder are observed in the spectrum at 3.711 eV (3,340 Å) and 2.660 eV (4,660 Å), respectively. The structure is assigned to the critical points in a bond calculation.