Far Infrared and Raman Optical Study of CdInGaS₄, CdIn₂S₄, HgInGaS₄ and CdIn₂S₂Se₂ Crystals

Abstract

Abstract Raman and infrared reflectivity spectra of CdInGaS 4 , CdIn 2 G 4 , HgInGaS 4 , and CdIn 2 S 2 Se 2 crystals have been investigated. The fiindamental phonon parameters, the limiting dielectric constants ϵ 0 and ϵ∞ and the reflectivity spectrum contours have been calculated using classical dispersion relations.