Conversion of infrared radiation into visible emission in NaY(WO4)2:Yb3+, Ho3+ crystal

被引：17

作者：

Huang, Xinyang ^{[1
]}

Wang, Guofu ^{[2
]}

机构：

[1] Jiangxi Univ Finance & Econ, Inst Res Funct Mat, Nanchang 330013, Jiangxi, Peoples R China

[2] Chinese Acad Sci, Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China

来源：

JOURNAL OF LUMINESCENCE | 2010年 / 130卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Upconversion emission; Yb3+/Ho3+:NaY(WO4)(2); Energy transfer; DEPENDENT UP-CONVERSION; LASER; LUMINESCENCE; ABSORPTION; INTENSITIES; SENSITIZER; SPECTRA;

D O I：

10.1016/j.jlumin.2010.03.035

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The spectroscopic characteristics and fluorescence dynamics for Yb3+/Ho3+:NaY(WO4)(2) crystal were investigated. The parameters of oscillator strengths, the spontaneous transition probabilities, the fluorescence branching ratios, the radiative lifetimes and the stimulated emission cross sections have been calculated based on Judd-Ofelt theory and Fuchtbauer-Ladenburg method. The energy transfer efficiency from Yb3+ to Ho3+ was 65.85%. The green emission (530-570 nm) corresponding to (F-5(4), S-5(2))-> I-5(8) transition, red emission (640-670 nm) due to F-5(5)-I-5(8) transition and NIR emission (740-770 nm) attributed to (F-5(4), S-5(2))-> I-5(7) transition were observed on 974 nm excitation at room temperature. Under low pump power, the intensity of green light emission is weaker than that of the red light, while under high pump power, the case is on the contrary. The upconversion is based on the two-photon process either the energy transfer from Yb3+ ions or by the excited state absorption. The proposed mechanisms of upconversion emissions were provided. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1702 / 1707

页数：6

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