期刊
JOURNAL OF LUMINESCENCE
卷 122, 期 -, 页码 5-7出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2006.01.064
关键词
ytterbium; calcium-fluoride; crystal; spectroscopy
类别
A detailed spectroscopic study of various Yb3+:CaF2 crystals with dopant concentrations ranging from 0.03 to 2 at% Yb3+ has been performed. By using site-selective laser excitation, the low-temperature (7 K) excitation and emission spectra recorded in the case of the lower doped samples (0.03% and 0.05%) are found to be dominated by three types of sites with excited state fluorescence lifetimes of about 2, 8 and 10 ms. Confronted with crystal field calculations, these sites have been identified as Yb3+ ions in trigonal (C-3v), tetragonal (C-4v) and cubic environments, respectively. At higher dopant concentrations (> 0.1 at%), evidence is found of a third kind of site, whose contribution increases up to be dominant as dopant concentration is increased above about 1at%Yb3+ and which gives rise to the lasing center which has been recently discovered and operated. (c) 2006 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