ON THE CORRELATION BETWEEN OPTICAL AND ELECTRICAL-PROPERTIES IN REDUCED LITHIUM-NIOBATE CRYSTALS

被引：11

作者：

DHAR, A ^{[1
]}

MANSINGH, A ^{[1
]}

机构：

[1] UNIV DELHI,DEPT PHYS & ASTROPHYS,DELHI 110007,INDIA

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 1991年 / 24卷 / 09期

关键词：

D O I：

10.1088/0022-3727/24/9/019

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The optical transmission of LiNbO3 single crystals has been measured in the wavelength range 200-900 nm, for different degrees of reduction, to study the effect of reduction on the optical characteristics of LiNbO3 near the fundamental absorption edge. The optical transitions in LiNbO3 were found to be indirect and the band gap decreased with increasing degree of reduction. The band observed at 2.48 eV in the absorption spectrum in heavily reduced samples has been attributed to the formation of polarons and the theoretical model of Reik and Heese for small polarons is used to correlate the optical and electrical properties.

引用

页码：1644 / 1648

页数：5

共 34 条

[1] IMPROVED ELECTROOPTIC MATERIALS AND FIXING TECHNIQUES FOR HOLOGRAPHIC RECORDING [J].