Influence of ferroelectric domain walls on the Raman scattering process in lithium tantalate and niobate

被引：28

作者：

Stone, Greg ^{[1
]}

Dierolf, Volkmar ^{[1
]}

机构：

[1] Lehigh Univ, Dept Phys, Bethlehem, PA 18015 USA

来源：

OPTICS LETTERS | 2012年 / 37卷 / 06期

基金：

美国国家科学基金会;

关键词：

OPTICAL-PROPERTIES; DISPERSION; FREQUENCIES;

D O I：

10.1364/OL.37.001032

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report changes in the Raman spectra at ferroelectric domain walls in near-stoichiometric LiNbO3 and stoichiometric LiTaO3. We find a decrease of intensity for the regular bulk Raman peaks along with increases of intensity in spectral regions that correspond to phonons, which propagate at an angle with respect to the incident light. In the backscattering geometry, such modes are not supported in the bulk crystal due to momentum conservation. We confirm that these changes are due to the domain wall itself and are independent of intrinsic defects or charging effects. (C) 2012 Optical Society of America

引用

页码：1032 / 1034

页数：3

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