A novel luminescent center in LiNbO3: Cr: Mg crystals

被引：7

作者：

Basun, SA

Salley, GM

Kaplyanskii, AA

Gallagher, HG

Polgar, K

Lu, L

Happek, U ^{[1
]}

机构：

[1] Univ Georgia, Dept Phys, Athens, GA 30602 USA

[2] Univ Georgia, Dept Astron, Athens, GA 30602 USA

[3] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[4] Univ Strathclyde, Dept Phys & Appl Phys, Glasgow, Lanark, Scotland

[5] Inst Solid State Phys, Opt Crystal Phys Lab, H-1121 Budapest, Hungary

来源：

JOURNAL OF LUMINESCENCE | 1999年 / 83-4卷

基金：

俄罗斯基础研究基金会;

关键词：

LiNbO3; defects; pairs; Cr;

D O I：

10.1016/S0022-2313(99)00139-8

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the observation of a novel luminescent center in LiNbO3 : Cr : Mg. This center is characterized by a set of narrow emission lines located in the 770 - 850 nm region which occur in addition to the well-known broad T-4(2) emission of the major low-field Cr3+ site. The set of narrow emission lines can be readily observed in samples containing more than 4% Mg. All lines exhibit the same relaxation time and are strongly rc polarized. Substitution of Mg by Zn produces the same set of lines, indicating that the Mg ions are not directly incorporated in the novel center, but play an essential charge compensating role. Based on our absorption, excitation, luminescence, and fluorescent line-narrowing experiments, we associate the novel center with an exchange coupled Cr-center. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：435 / 439

页数：5

共 10 条

[1]

BASUN SA, IN PRESS

[2] CR3+ AND RARE EARTH DOPED LINBO3 [J].