点击次数：

论文类型：期刊论文

发表时间：2008-05-01

发表刊物：OPTICS COMMUNICATIONS

收录刊物：SCIE

卷号：281

期号：9

页面范围：2531-2534

ISSN号：0030-4018

关键字：lithium tantalate; defects; UV-Vis absorption; photoluminescence

摘要：The congruent, stoichiometric, and Mg doped stoichiometric LiTaO3 single crystals have been successfully grown by the Czochralski technique. The evolution of defect structures caused by varying composition and post-growth processing has been evaluated from the optical absorption and photoluminescence measurements. Optical absorption studies showed that the UV absorption edge is very sensitive to the composition of LiTaO3 crystals. Photoluminescence of various LiTaO3 single crystals at room temperature was observed. The emission bands centered at 360, 430, and 530 nm were assigned to different defects, which can well show the defect information in LiTaO3 crystals. (c) 2008 Elsevier B.V. All rights reserved.