Infrared optical properties of calcium lanthanum sulfide

被引：14
|
作者：
Merzbacher, Celia I. [1 ]
Chess, Daniel L. [1 ]
White, William B. [1 ]
机构：
[1] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
来源：
MATERIALS LETTERS | 2010年 / 64卷 / 03期
关键词：
IR windows; CaLa2S4; IR spectra; CERAMICS; SPECTRA;
D O I：
10.1016/j.matlet.2009.11.007
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The fundamental infrared optical properties of CaLa2S4 were determined by specular reflectance measurements from theoretically dense, optically transparent, polycrystalline ceramics. Kramers-Kronig transformation of the reflectance spectra permitted the extraction of refractive index, and transverse and longitudinal optic modes. Five transverse modes predicted by factor group analysis were observed with the intense high wavenumber mode occurring at 142 and 205 cm(-1). The other three modes are weak and occur at 37, 59, and 86 cm(-1). The two high wavenumber intense modes have identifiable longitudinal modes at 151 and 318 cm(-1). (C) 2009 Elsevier B.V. All rights reserved.
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页码：334 / 336
页数：3
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