Optical spectra of TlGaS2 crystals

NEMERENCO, L.; SYRBU, N. N.; DOROGAN, V.; BEJAN, N. P.; ZALAMAI, V. V.

Optical spectra of TlGaS2 crystals

NEMERENCO, L.; SYRBU, N. N.; DOROGAN, V.; BEJAN, N. P.; ZALAMAI, V. V.

URI: https://doi.org/10.1016/j.jlumin.2015.12.001
http://repository.utm.md/handle/5014/12377

Date: 2016

Abstract:

Wavelength modulated reflection spectra measured at temperatures 14K and 300K in E||a and E||b polarizations for TlGaS2 crystals were investigated. The ground and excited states of excitons B2u in E||a polarization and B3u in E||b polarization were observed and the main parameters of exitons and bands were determined. The optical functions for wide energies (2–6eV) were calculated by Kramers–Kronig analysis of reflection spectra. The wavelengths of isotropic points in TlGaS2 crystals were defined.