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Local structure and its effect on the oscillator strengths and emission properties of Ho3+ in chalcohalide glasses
被引:26
|作者:
Lee, Tae Hoon
Kwon, Yong Kon
Heo, Jong
[1
]
机构:
[1] Pohang Univ Sci & Technol, Ctr Informat Mat, Pohang 790784, Gyeongbuk, South Korea
关键词:
chalcohalides;
absorption;
luminescence;
short-range order;
D O I:
10.1016/j.jnoncrysol.2008.01.017
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:
The formation of structural units in Ge-Ga-S glass with CsBr addition and its effect on the optical band gap and several spectroscopic properties of Ho3+ were investigated. The optical band gap of the host glasses and the oscillator strengths of Ho3+ absorption decreased sharply when the ratio of CsBr/Ga became close to unity. These property changes were associated with the formation of structural units of [GaS3/2Br](-) and they have a crucial effect on the changes of the local structure around Ho3+ ions. The local structure was not sensitive to the As or Br addition but was critically dependent on the concentration of CsBr. (C) 2008 Elsevier B.V. All rights reserved.
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页码:3107 / 3112
页数:6
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