Urbach rule and optical properties of the LiNbO3 and LiTaO3

被引：32

作者：

Çabuk, S ^{[1
]}

Mamedov, A ^{[1
]}

机构：

[1] Cukurova Univ, Fac Arts & Sci, Dept Phys, TR-01330 Adana, Turkey

来源：

JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS | 1999年 / 1卷 / 03期

关键词：

absorption edge; Urbach rule;

D O I：

10.1088/1464-4258/1/3/313

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optical spectroscopy methods are used to study the spectra of some oxygen-octahedral ferroelectrics-namely LiNbO3 and LiTaO3. It is shown that for the measured range of E and T, alpha varies exponentially with the photon energy following the empirical Urbach rule. A study of the role of the BO6-octahedron by using spectroscopic methods can cast light on the many physical phenomena that take place in LiNbO3 and LiTaO3. For these crystals, absorption edge, band gap, Urbach constants and phonon energy are found.

引用

页码：424 / 427

页数：4

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