Birefringence and excitonic spectra of TlGaS2 crystals

被引：6
|
作者：
Stamov, I. G. [1 ]
Syrbu, N. N. [2 ]
Ursaki, V. V. [3 ]
Zalamai, V. V. [3 ]
机构：
[1] Tiraspol State Corp Univ, MD-3300 Tiraspol, Moldova
[2] Tech Univ Moldova, Kishinev 2004, Moldova
[3] Moldavian Acad Sci, Inst Appl Phys, Kishinev 2028, Moldova
来源：
OPTICS COMMUNICATIONS | 2013年 / 298卷
关键词：
Semiconductor compound; Optical constants; Excitons; Band structure; BAND-STRUCTURE; SINGLE-CRYSTALS; INCOMMENSURATE PHASE; TRANSITIONS; BETA-TLINS2; DISPERSION; COMPOUND; TLINS2;
D O I：
10.1016/j.optcom.2013.02.019
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The anisotropy of transmission spectra was investigated in TlGaS2 crystals. An intensive transmission line was found in samples placed between two crossed polarizers. Ground and excited states of excitons Were detected in reflectivity spectra of TlGaS2 crystals measured in E vertical bar vertical bar a and E vertical bar vertical bar b polarizations. The reflection spectra of excitons were calculated according to dispersion equations, and the main parameters of excitons and energy bands were determined in the center of the Brillouin zone. The refractive indices n(a) and n(b) were estimated for E vertical bar vertical bar a and E vertical bar vertical bar b polarizations. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：145 / 149
页数：5
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