红外与毫米波学报, 2017, 36 (4): 403, 网络出版: 2017-10-12  

光学碱度与能量传递对Bi/Yb3+共掺杂锗酸盐玻璃近红外发光性质的影响

Effect of optical basicity and energy transfer on near-infrared luminescence in Bi/Yb3+co-doped germanate glasses
王荣飞 1,2,3,*周志文 1刘静 1杨杰 1,2,3孙韬 2杨宇 2
作者单位
1 云南大学 材料科学与工程学院 国家光电子能源材料国际联合研究中心, 云南 昆明 650091
2 云南大学 光电信息材料研究所, 云南 昆明 650091
3 云南省微纳材料与技术重点实验室, 云南 昆明 650091
摘要
采用传统高温熔融法制备了Bi/Yb3+共掺杂锗酸盐玻璃, 通过吸收光谱、近红外光谱和荧光衰减寿命测试, 研究了玻璃样品的近红外发光性质.研究结果表明, 玻璃样品在980 nm 或808 nm 激光激发下, 均能同时观察到Yb3+离子和Bi离子的近红外发光, Yb3+离子与Bi离子之间存在相互能量传递.随着Yb3+离子浓度的增加, 玻璃基质的光学碱度和Yb3+离子到 Bi 离子的能量传递效率均增加, 讨论了能量传递效率的提高对Bi离子发光的增强作用与光学碱度增加对Bi离子发光的削弱作用的竞争影响机制, 获得了Bi/Yb3+离子共掺杂锗酸盐玻璃的近红外发光的机理.
Abstract
Bi/Yb3+ co-doped germanate glasses were prepared by conventional melting-quenching technique. Near infrared (NIR) luminescence properties in Bi/Yb3+ co-doped germanate glasses were investigated by the absorption spectrum, NIR luminescence spectra, and fluorescence lifetime measurement. NIR luminescence of both Yb3+ and Bi ions was observed simultaneously, either under 980 or 808 nm excitation LD. The results show that ET process existed between Bi-related NIR emission centre and Yb3+ ions. With the increasing in Yb3+ ions concentration, both ET efficiency from Yb3+ ions to Bi ion and optical basicity of glass matrix are increased. The competitive effects of enhancing by the ET process and weakening by optical basicity on NIR luminescence properties of Bi ions were investigated.

王荣飞, 周志文, 刘静, 杨杰, 孙韬, 杨宇. 光学碱度与能量传递对Bi/Yb3+共掺杂锗酸盐玻璃近红外发光性质的影响[J]. 红外与毫米波学报, 2017, 36(4): 403. WANG Rong-Fei, ZHOU Zhi-Wen, LIU Jing, YANG Jie, SUN Tao, YANG Yu. Effect of optical basicity and energy transfer on near-infrared luminescence in Bi/Yb3+co-doped germanate glasses[J]. Journal of Infrared and Millimeter Waves, 2017, 36(4): 403.

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