Optical properties of Ho3+ in sol-gel silica glass co-doped with Aluminium

被引：18

作者：

Rai, S. ^{[1
]}

Fanai, A. L. ^{[1
]}

机构：

[1] Mizoram Univ, Dept Phys, Laser & Photon Lab, Aizawl 796004, India

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2016年 / 449卷

关键词：

Sol-gel; Holmium; Aluminium; Judd-Ofelt; Photoluminescence; Cross-relaxation; RARE-EARTH; UP-CONVERSION; FLUORESCENCE; TRANSITIONS; EMISSION; INTENSITIES; LASER; IONS;

D O I：

10.1016/j.jnoncrysol.2016.07.023

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Ho3+ in SiO2 glass samples co-doped with Aluminium at different concentrations have been synthesized by sol-gel method. The Judd-Ofelt parameters Omega(2), Omega(4) and Omega(6) were obtained from the absorption spectra in the visible region and the value of Omega(2) increases in the presence of Aluminium. Photoluminescence emissions in the visible region at 492, 550, 662 and 756 nm were observed under 450 nm excitation. In addition to the overall luminescence enhancement, selective enhancement of the 550 and 756 nm emissions was observed in the presence of Aluminium. The selective enhancement was observed only after annealing above 950 degrees C. The results obtained show the lowering of site symmetry of the Ho3+ ions as well as the reduction in cross-relaxation in the presence of Aluminium. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：113 / 118

页数：6

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