Fabrication and optical properties of transparent Nd3+ :YAG nanoceramics

被引：14

作者：

Strek, W.

Bednarkiewcz, A.

Hreniak, D.

Mazur, P.

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 Wroclaw, Poland

来源：

JOURNAL OF LUMINESCENCE | 2007年 / 122卷

关键词：

YAG; nanoceramics; neodymium; spectroscopic investigations; concentrations dependence;

D O I：

10.1016/j.jlumin.2006.01.100

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The transparent Nd:YAG nanoceramics composed of nanocrystalline grains were fabricated by hot-pressing technique. Their absorption and luminescence spectra were measured. The effect of Nd concentration on absorption and luminescence spectra was studied. It was found that the concentration strongly affects the luminescence spectra appearing in decrease of the intensities of F-4(3/2) -> I-4(9/2) band compared to the F-4(3/2) -> I-4(11/2) band. The spectra are also significantly broadened. Additionally the Judd-Ofelt analysis was performed and the radiative lifetimes were calculated. The Q; decreased with increasing sintering temperature, from 1.60, 2.86 and 5.14 x 10(-20) cm(2) at 800 degrees C down to 0.75, 2.44 and 3.70 x 10(-20) cm(2) for 1200 degrees C, respectively for lambda = 2,4,6. The mechanism of concentration quenching of Nd3+ luminescence in YAG nanoceramics was briefly discussed. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：70 / 73

页数：4

共 6 条

[1] Enhanced cooperative absorption and upconversion in Yb3+ doped YAG nanophosphors [J].