Optical properties of Sm3+ doped Ca3(Nb,Ga)5O12 and Ca3(Li,Nb,Ga)5O12 single crystals

被引：19
作者：
Gheorghe, C. [1 ]
Hau, S. [1 ,2 ]
Gheorghe, L. [1 ]
Voicu, F. [1 ,2 ]
Greculeasa, M. [1 ]
Achim, A. [1 ]
Enculescu, M. [3 ]
机构：
[1] Natl Inst Laser Plasma & Radiat Phys, ECS Lab, Bucharest 077125, Romania
[2] Univ Bucharest, Doctoral Sch Phys, Bucharest, Romania
[3] Natl Inst Mat Phys, Str Atomistilor 105b, Magurele 077125, Ilfov, Romania
来源：
JOURNAL OF LUMINESCENCE | 2017年 / 186卷
关键词：
Disordered garnet systems; Judd-Ofelt parameters; Sm3+ spectroscopy; Orange emission; CALCIUM NIOBIUM GALLIUM; SPECTROSCOPIC PROPERTIES; SPECTRAL PROPERTIES; DISORDERED CRYSTAL; GROWTH; IONS; INTENSITIES; ABSORPTION; CNGG;
D O I：
10.1016/j.jlumin.2017.02.036
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Sm3+ doped partially disordered calcium-niobium-gallium -garnet (CNGG) and calcium-lithium-niobium-gallium -garnet (CLNGG) single crystals were grown by the Czochralski method. Spectroscopic characteristics of Sm:CNGG and Sm:CLNGG single crystals were obtained by high-resolution absorption and emission spectra and emission dynamics measurements. Partial energy levels of Sm3+ doped CNGG and CLNGG were extracted from the measured spectra. The Judd-Ofelt theory has been applied to evaluate the Omega(t)(t=2,4, 6) intensity parameters, radiative transition rates A(r) branching ratios beta, and radiative lifetime tau(r), of the fluorescent Sm3+ (4)G(5/2) level. The emission cross-sections for the (4)G(5/2)-> H-6(J) (J=5/2, 7/2, 9/2) transitions of special interest for visible laser application were obtained by the Fucht-bauer - Ladenburg equation. The interaction between Sm3+ ions is dipole-dipole type and the C-DA, microparameter for both crystals was calculated based on Inokuti-Hirayama model. (C) 2017 Elsevier B.V. All rights reserved.
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页码：175 / 182
页数：8
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