Redistribution of Cr3+ defect centres in LiNbO3 crystals:: the MgO effect

被引：12

作者：

Diaz-Caro, J

Garcia-Sole, J

Martinez, JL

Henderson, B

Jaque, F

Han, TPJ

机构：

[1] Univ Autonoma Madrid, Dept Fis Mat, E-28049 Madrid, Spain

[2] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

[3] Univ Strathclyde, Dept Phys & Appl Phys, Glasgow G1 1XN, Lanark, Scotland

来源：

OPTICAL MATERIALS | 1998年 / 10卷 / 01期

关键词：

D O I：

10.1016/S0925-3467(97)00059-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A broad emission band centred at 1000 nm is reported in codoped LiNbO3:Cr:MgO crystals. The intensity of this emission band increases with increasing MgO concentration at dopant levels higher than 4%. This emission band is attributed to Cr3+ ions substituting into Nb5+ sites. For MgO concentration levels above 4% a transfer of Cr3+ ions located in Li+ sites to Nb5+ sites is observed. This redistribution of the Cr3+ ions is discussed in terms of the occupation of Li+ vacancies and antisites by Mg2+ ions. Time resolved excitation spectra and fluorescence lifetime decays of the two kind of Cr3+ ions are reported. (C) 1998 Elsevier Science B.V.

引用

页码：69 / 77

页数：9

共 12 条

[1] DEFECT STRUCTURE DEPENDENCE ON COMPOSITION IN LITHIUM-NIOBATE [J].