Optical Absorption and Luminescence of Gd3Ga5O12:Cr,Mg Epitaxial Films

被引：4
|
作者：
Zakharko, Ya. [1 ]
Syvorotka, I. I. [2 ]
Luchechko, A. [1 ]
Syvorotka, I. M. [2 ]
Sugak, D. [2 ,3 ]
Vakiv, M. [2 ]
机构：
[1] Ivan Franko Natl Univ Lviv, Fac Elect, UA-79017 Lvov, Ukraine
[2] SRC Carat, Inst Mat, UA-79031 Lvov, Ukraine
[3] Lviv Polytech Natl Univ, UA-79646 Lvov, Ukraine
来源：
ACTA PHYSICA POLONICA A | 2010年 / 117卷 / 01期
关键词：
SPECTROSCOPY; LASERS; GGG; CR;
D O I：
10.12693/APhysPolA.117.111
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The optical absorption, emission spectra and luminescence decay kinetics under photoexcitation of Gd3Ga5O12 (GGG) garnet epitaxial films doped with Cr3+ ions and co-doped with Cr3+ and Mg2+ ions have been investigated. Luminescence of the GGG:Cr films due to T-4(2) -> (4)A(2) and E-2 -> (4)A(2) transitions in Cr3+ ions have been observed. Increase of the activator ions concentration has an influence on the intensity and decay time of Cr3+ ions photoluminescence. Introduction of the magnesium ions leads to partial transformation of chromium valence state (Cr3+ -> Cr4+) and to the appearance of a broad absorption band with the maximum at 860 nm. The narrow lines with luminescence maxima at 704 and 706 nm have arisen in the highly doped GGG:Cr,Mg films.
引用
收藏
页码：111 / 113
页数：3
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