ABSTRACT
In this paper we report for the first time a comparative study of polarized infrared and Raman measurements of oriented ZnIn2Se4 single crystals in the wavenumber range from 20 cm-1 to 450 cm-1. The crystals used in the study were grown from high temperature solutions using PbCl2 as solvent. The far infrared reflectance spectra show four lattice vibrational modes for each direction of polarization. The separation of the infrared active E and B symmetry modes of highest and second highest frequencies could be observed and allowed an assignment of the high frequency phonon modes to the different vibrational symmetries. The Raman measurements confirmed the data given in the literature.
