期刊
THIN SOLID FILMS
卷 520, 期 21, 页码 6510-6514出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2012.06.072
关键词
Lithium niobate; Thin films; Sol-gel deposition; Optical bandgap; Transmission spectroscopy; Surface morphology; X-ray diffraction
Lithium niobate (LN) thin films were deposited on quartz substrates by sol-gel technique. The measured absorption and photoluminescence spectra show that the band structure of LN thin films is direct unlike indirect band-gap in bulk LN and the optical band-gap of these LN thin films was measured to be 4.7 eV which is similar to 1 eV greater than that for stoichiometric bulk LN. The dependence of the blue shift of band-gap on several parameters like quantum confinement, composition (Li:Nb ratios of LN thin films) and strain was also investigated. The results obtained show that the large blue shift in band-gap of LN thin films is primarily due to strain in the film. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据