Raman Studies of Photorefractive Lithium Niobate Single Crystals

被引：1
|
作者：
Palatnikov, M. N. [1 ]
Sidorov, N. V. [1 ]
Yanichev, A. A. [1 ]
Manukovskaya, D. V. [1 ]
Antonycheva, E. A. [2 ]
Bormanis, K. [3 ]
Sternberg, A. [3 ]
机构：
[1] RAS, Kola Sci Ctr, Inst Chem, Apatity, Russia
[2] Far Eastern State Transport Univ, Khabarovsk, Russia
[3] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia
来源：
FERROELECTRICS | 2014年 / 462卷 / 01期
关键词：
Raman band broadening; Lithium niobate; single crystals; photo-refraction;
D O I：
10.1080/00150193.2014.891414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A study of Raman spectra of lithium niobate single crystals: stoichiometric, ostensibly pure congruent LiNbO3, and congruent LiNbO3 containing admixture of yttrium is reported. Raman bands observed in spectra excited by visible laser radiation are thoroughly compared to the same bands excited by infrared laser radiation. The broadening of Raman bands excited by radiation of shorter wavelengths is attributed to photo-refraction induced by visible radiation (514nm) while being absent under infrared radiation (1064nm). Attributing the effect of photo-refraction to radiation-induced structural changes in the illuminated part of the crystal lattice the authors interpret the observed broadening of Raman bands as a result of structural disorder caused by the exciting radiation.
引用
收藏
页码：257 / 262
页数：6
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