Optical properties of amorphous Ge30-xSbxS70 films

被引：9

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

页码：14 / 18

页数：5

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