Influence of the electron-lattice coupling for Cr3+ ions in Nb5+ site into congruent co-doped LiNbO3:: Cr3+: ZnO crystal

被引：11
|
作者：
Torchia, GA
Matos, OM
Vaveliuk, P
Tocho, JO
机构：
[1] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain
[2] Ctr Invest Opt, RA-1900 La Plata, Argentina
[3] Natl Univ La Plata, Fac Ciencias Exactas, Dept Fis, Buenos Aires, DF, Argentina
[4] Univ Fed Paraiba, Ctr Ciencoias Exatas Eida Nat, Dept Fis, BR-58051970 Pessoa, PB, Brazil
来源：
SOLID STATE COMMUNICATIONS | 2003年 / 127卷 / 08期
关键词：
Cr3+impurities; LiNbo(3) crystals; phonon electron interaction; laser spectroscopy;
D O I：
10.1016/S0038-1098(03)00508-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
This paper shows the important role that plays the electron-lattice coupling to represent correctly the energy levels of Cr3+ ions in Nb5+ Site into congruent LiNbO3 crystals doped with 5.3% of ZnO. Racah's parameters: B = 646 cm(-1), C = 3022 cm(-1) and crystal field intensity Dq = 1342 cm(-1) were determined and the Tanabe-Sugano's diagram was constructed. The characteristics of the absorption and emission spectra of Cr3+ ions in Nb5+ site have been explained in terms of the Configurational Co-ordinate model in the harmonic approximation. Huang-Rhys parameter, S = 3.5 and the breathing phonon energy. homega = 460 cm(-1), are also reported in this work. Different values of breathing phonon for Cr3+ in Nb5+ site than in Li+ site could explain the higher luminescent quantum efficiency of Cr3+ ions located in Nb5+ site in LiNbO3 crystals. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：535 / 539
页数：5
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