Optical properties of amorphous Ge30-xSbxS70 films

被引：10
|
作者：
Farg, ESM [1 ]
机构：
[1] Menoufia Univ, Fac Engn, Basic Sci Engn Dept, Shibin Al Kawm, Egypt
来源：
OPTICS AND LASER TECHNOLOGY | 2006年 / 38卷 / 01期
关键词：
amorphous; Ge; Sb; S thin films; optical;
D O I：
10.1016/j.optlastec.2004.11.003
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We have analyzed the optical properties of a-Ge30-xSbxS70 chalcogenide glass films (x = 0, 10, 20 and 30 at%); the chalcogenide films were prepared by vacuum thermal evaporation. The optical-absorption data indicate that the absorption mechanism is non-direct transition. We found that the optical band gap, E-opt, decreases from 2.04 +/- 0.01 to 1.74 +/- 0.01 eV, whereas the refractive index increases with increasing Sb content. Data are analyzed by the Wemple equation, which is based on the single-oscillator model. (c) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：14 / 18
页数：5
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