Optical properties of boro-germanate glass systems

被引：1
|
作者：
Nadeem, M. Y. [1 ]
Awan, I. M. [1 ]
Wasiq, M. F. [1 ]
机构：
[1] B Z Univ, Dept Phys, Multan 60800, Pakistan
来源：
MODERN PHYSICS LETTERS B | 2007年 / 21卷 / 15期
关键词：
boro-germanate glass; optical band gap; Abbe number;
D O I：
10.1142/S0217984907013304
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Three samples of boro-germanate glass system (GeO2-B2O3) were prepared by cooling the melt from 1473 degrees K in the compositional series containing 40, 35 and 30 mol% B2O3 For these glasses the optical absorbance, % transmission, optical band gap, relative permittivity (Er), index of refraction (n) and index of dispersion (Abbe No., V-d) have been determined. The position of the absorption edge and hence the optical band gap (E-opt) was found to depend on glass composition. The absorption edge was attributed to indirect transitions. The values of E-opt and n(d) were observed to decrease with increasing B2O3 content while epsilon(r) and V-d increased with increasing B2O3 content.
引用
收藏
页码：955 / 963
页数：9
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