Polarized Raman Spectroscopic Study of ZnGeP$_{2}$

ORAL

Abstract

The ternary semiconductor ZnGeP$_{2}$ alloy is one of the most technologically important material systems among the II-IV-V$_{2 }$compound family since it is promising in device applications based on non-linear optics. In order to employ ZnGeP2 material system in device applications such as; frequency doubling, parametric optical amplification, second order differential frequency coupling, the ZnGeP$_{2}$ crystal structure must have an oriented distortion that results in birefringent effect. The orientation of the distortion in the crystal structure can be promoted into a preferred direction so that only one plane of the crystal becomes birefringent. In this study, we present detailed study of the polarization dependent behavior of the phonon modes in ZnGeP2 crystal using Polarized Raman Spectroscopy (PRS). The results of our studies demonstrate non-linear mixing of radiation only occurs in the crystalline plane where conservation of momentum or so-called phase matching is present. The effect of birefringence in phonon modes of ZnGeP$_{2}$ crystal in Raman spectra is studied.

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Authors

  • Ramazan Atalay

    Department of Physics \& Astronomy, Georgia State University, Atlanta, GA, 30303, Department of Physics and Astrronomy, Georgia State University, Atlanta GA. 30303

  • Goksel Durkaya

    Department of Physics \& Astronomy, Georgia State University, Atlanta, GA, 30303, Department of Physics and Astrronomy, Georgia State University, Atlanta GA. 30303, Physics \& Astronomy Department, Georgia State University, Atlanta, GA 30303, Physics \& Astronomy Department, Georgia State University, Atlanta, GA, 30303

  • Nikolaus Dietz

    Georgia State University, Atlanta, Department of Physics \& Astronomy, Georgia State University, Atlanta, GA, 30303, Georgia State University, Department of Physics and Astrronomy, Georgia State University, Atlanta GA. 30303, Physics \& Astronomy Department, Georgia State University, Atlanta, GA 30303, Physics \& Astronomy Department, Georgia State University, Atlanta, GA, 30303