PHOTOELECTRIC STUDIES OF 2-STEP PHOTOIONIZATION OF TI-3+ IONS IN OXIDE CRYSTALS

被引：9

作者：

BASUN, SA ^{[1
]}

FEOFILOV, SP ^{[1
]}

KAPLYANSKII, AA ^{[1
]}

SEVASTYANOV, BK ^{[1
]}

SHARONOV, MY ^{[1
]}

STAROSTINA, LS ^{[1
]}

机构：

[1] AV SHUBNIKOV CRYSTALLOG INST,MOSCOW 117333,USSR

来源：

JOURNAL OF LUMINESCENCE | 1992年 / 53卷 / 1-6期

关键词：

D O I：

10.1016/0022-2313(92)90098-T

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In photoconductivity studies in Al2O3:Ti3+ and Y3Al5O12:Ti3+ (YAG:Ti3+) a nearly quadratic dependence of Photocurrent on excitation intensity is experimentally observed. Spectral and kinetics measurements show that the Ti3+ Photoionization under visible and UV excitation in the t --> e transition region takes place as a result of a two-step process via the intermediate e state. The experimentally estimated energy between this e level of Ti3+ and the conduction band bottom is in Al2O3 larger and in YAG sma er than the zero-phonon e-t line (ZPL) energy. This determines the essential difference in persistent hole-burning in the ZPL of Al2O3:Ti3+ and YAG:Ti3+ [1] and in the efficiency of e level optical pumping.

引用

页码：28 / 31

页数：4

共 12 条

[1] OPTICAL-TRANSITIONS IN TITANIUM-DOPED YAG [J].