Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Specific features of the optical spectra in Tl2In2S3Se layered single crystals
Date
2007-06-01
Author
Hasanlı, Nızamı
Güler, Işıkhan
Metadata
Show full item record
This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
.
Item Usage Stats
225
views
0
downloads
Cite This
The optical properties of Tl2In2S3Se layered single crystals have been studied by means of transmission and reflection measurements in the wavelength range of 450-1100 nm. The analysis of the absorption data revealed the presence of both optical indirect and direct transitions with energy band gaps of 2.16 and 2.42 eV, respectively. The observed coexistence of indirect and direct energy band gaps is related to the anisotropy of the TI-containing layered crystals. The dispersion of the refractive index is discussed in terms of the Wemple-Di Domenico single-effective-oscillator model. The refractive index dispersion parameters: oscillator energy, dispersion energy, oscillator strength and zero-frequency refractive index were found to be 4.78 eV, 43.58 eV, 13.18 x 10(13) m(-2) and 3.18, respectively. From X-ray powder diffraction study, the parameters of monoclinic unit cell were determined. (C) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Subject Keywords
Optical constants
,
Dispersion of refractive index
,
Optical band gap
,
Layered crystals
URI
https://hdl.handle.net/11511/30475
Journal
CRYSTAL RESEARCH AND TECHNOLOGY
DOI
https://doi.org/10.1002/crat.200610874
Collections
Graduate School of Natural and Applied Sciences, Article
Suggestions
OpenMETU
Core
Optical properties of TlGaSeS layered single crystals
Güler, Işıkhan; Hasanlı, Nızamı (2007-12-01)
The optical properties of TlGaSeS layered single crystals have been investigated by measuring the transmissions and the reflections in the wavelength region between 400 and 1100 nm. The optical indirect transitions with a band gap energy of 2.27 eV and direct transitions with a band gap energy of 2.58 eV were found by means of the analysis of the absorption data at the room temperature. The rate of change of the indirect band gap with temperature, that is, gamma = -3.2 x 10(-4) eV/K, was determined from the...
Optical properties of Tl2In2Se3S layered single crystals
Güler, Işıkhan; Hasanlı, Nızamı (2010-01-01)
The optical properties of Tl2In2Se3S layered single crystals have been analyzed using transmission and reflection measurements in the wavelength region between 500 and 1100 nm. The optical indirect transitions with a band gap energy of 1.96 eV and direct transitions with a band gap energy of 2.16 eV were determined from analysis of absorption data at room temperature. Dispersion of the refractive index is discussed in terms of the Wemple-DiDomenico single-effective-oscillator model. The refractive index dis...
Refractive index and oscillator parameters in TlGaS2, TlGaSe2 and TlInS2 layered crystals
Hasanlı, Nızamı (2011-01-01)
The optical properties of TlGaS2, TlGaSe2, and TlInS2 crystals have been investigated through the transmission and reflection measurements at room temperature in the wavelength range of 400-1100 nm. These measurements allowed determination of spectral dependence of the refractive index for all crystals studied. The dispersion of the refractive index is discussed in terms of the Wemple-DiDomenico single-effective-oscillator model. The refractive index dispersion parameters: the oscillator energies, the dispe...
Temperature-tuned band gap energy and oscillator parameters of TlInSeS layered single crystals
Hasanlı, Nızamı; Güler, Işıkhan (2008-09-10)
The parameters of monoclinic unit cell of TlInSeS layered crystals were determined from X-ray powder diffraction study. The optical properties of TlInSeS have been investigated by means of transmission and reflection measurements in the wavelength range of 500-1100 nm. The optical indirect transitions with band gap energy of 2.05 eV and direct transitions with band gap energy of 2.21 eV were found by means of the analysis of the absorption data at room temperature. Transmission measurements carried out in t...
Compositional dependence of refractive index and oscillator parameters in T1GaS(2x)Se(2(1-x)) layered mixed crystals (0 <= x <= 1)
Hasanlı, Nızamı (2012-09-14)
Optical characterization of TIGaS2xSe2(1-x) mixed crystals have been carried out at room temperature using the transmission and reflection measurements in the wavelength range of 400-1100 nm. The spectral dependence of the refractive index for all compositions of studied crystals were obtained. The dispersion of the refractive index is discussed in terms of the Wemple-DiDomenico single-effective-oscillator model. The compositional dependencies of refractive index dispersion parameters: oscillator energy, di...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
N. Hasanlı and I. Güler, “Specific features of the optical spectra in Tl2In2S3Se layered single crystals,”
CRYSTAL RESEARCH AND TECHNOLOGY
, pp. 621–625, 2007, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30475.
