Cooperative emission study in ytterbium doped NdVO4

被引：5
|
作者：
Levesque, Y. [1 ]
Jandl, S. [1 ]
Bettinelli, M. [2 ,3 ]
机构：
[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada
[2] Univ Verona, DB, Lab Solid State Chem, I-37134 Verona, Italy
[3] UdR Verona, INSTM, I-37134 Verona, Italy
来源：
JOURNAL OF LUMINESCENCE | 2011年 / 131卷 / 05期
关键词：
Cooperative emission; Crystal field; Superexchange; ion pairs; CRYSTALS; MECHANISM;
D O I：
10.1016/j.jlumin.2011.01.025
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The infrared and visible cooperative emissions of ytterbium ions are studied in Yb-doped NdVO4 single crystals. The absorption of optical phonons allows the emissions at room temperature when a Nd:YAG laser is used. Low temperature emissions are observed due to the Nd3+ -> Yb3+ energy transfer following an argon ion laser excitation of the Nd3+ ions. Analysis of the cooperative emission at low doping concentration (1%) indicates that it is generated by distant pair forming Yb3+ ions while at high doping concentration (>= 5%) close ions magnetically coupled and superexchange mechanisms prevail in the emitting process. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：1077 / 1081
页数：5
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