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- Title
Spectroscopic ellipsometry studies of optical properties of TlIn(S<sub>0.25</sub>Se<sub>0.75</sub>)<sub>2</sub> crystal.
- Authors
Guler, I.; Isik, M.; Gasanly, N.
- Abstract
The optical properties of TlIn(S0.25Se0.75)2 crystals were studied by ellipsometry measurements. X-ray diffraction pattern presented well-defined peaks associated with monoclinic structure. Energy dependent graphs of various linear optical parameters of the crystal were presented in the 1.25–4.50 eV range. The band gap and Urbach energies of the compound were found as 1.96 and 0.68 eV, respectively, from the analyses of the absorption coefficient. Refractive index spectrum was analyzed considering the single-effective-oscillator model to get oscillator and dispersion energies, zero and high frequency dielectric constants, plasma frequency. Moreover, the nonlinear refractive index, first-order and third-order nonlinear susceptibilities of TlIn(S0.25Se0.75)2 crystal were revealed in the present paper.
- Subjects
OPTICAL properties; ELLIPSOMETRY; CRYSTALS; PERMITTIVITY; REFRACTIVE index; OPTICAL constants
- Publication
Applied Physics A: Materials Science & Processing, 2023, Vol 129, Issue 6, p1
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-023-06729-4