Luminescence properties of Nd:YAG nanoceramics prepared by low temperature high pressure sintering method

被引：34
作者：
Hreniak, D.
Fedyk, R.
Bednarkiewicz, A.
Strek, W.
Lojkowski, W.
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland
[2] Polish Acad Sci, Inst High Pressure Phys, PL-01142 Warsaw, Poland
来源：
OPTICAL MATERIALS | 2007年 / 29卷 / 10期
关键词：
YAG; nanoceramics; neodymium; pressure dependence; sintering; effective refractive index;
D O I：
10.1016/j.optmat.2006.05.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nd:YAG nanoceramics composed of 25 nm grains were obtained by a low temperature high pressure sintering process. Their absorption and luminescence spectra were measured. It was found that the transparency of Nd:YAG nanoceramics increases with the pressure of the fabrication process. This effect was explained in terms of reducing porosity of the ceramics with increasing the sintering pressure. It was found that the emission properties of Nd(3+) ion in YAG nanoceramic were substantially different compared to its single crystalline counterpart. In particular the emission intensities and decay times strongly depends on the applied pressure. The intensity ratio of the (4)F(3/2) -> (4)I(9/2) and (4)F(3/2) -> (4)I(11/2) emission transitions was much higher than in a single crystal and decreased with increasing the pressure. An efficient hot emission from the (4)F(5/2), (4)H(9/2) terms was observed at room temperature. (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：1244 / 1251
页数：8
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