ULTRAVIOLET-LASER EXCITED LUMINESCENCE OF TI-SAPPHIRE

被引：25

作者：

BAUSA, LE

VERGARA, I

JAQUE, F

SOLE, JG

机构：

[1] Dept. de Fisica Aplicada C-IV, Univ. Autonoma de Madrid

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 49期

关键词：

D O I：

10.1088/0953-8984/2/49/016

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The photoluminescence of Ti-doped sapphire (Ti:Al2O3) crystals excited using the second (532 nm) and fourth (266 nm) harmonics of a high power pulsed Nd:YAG laser has been investigated. Excitation at 532 nm into the crystal field band of Ti3+ produces the well known broad infrared emission band corresponding to the eg to t2g transition in the octahedral field approximation. However, this emission can also be excited with ultraviolet light together with an additional blue emission via a two-photon excitation process. This has two lifetime components of 600 and 21 mu s. The mechanism of excitation for the infrared emission band when it is excited via ultraviolet radiation has been studied: it is shown that the excited state of the Ti3+ ions is populated via an intermediate state (labelled as X) which clearly correlates with the shortest lifetime component of the blue emission.

引用

页码：9919 / 9925

页数：7

共 18 条

[1] RESIDUAL INFRARED-ABSORPTION IN AS-GROWN AND ANNEALED CRYSTALS OF TI-AL2O3 [J].