Terahertz time domain spectroscopy of complex dielectric constants of boson peaks

被引：21
|
作者：
Kojima, S [1 ]
Takeda, MW
Nishizawa, S
机构：
[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan
[2] Shinshu Univ, Fac Sci, Dept Phys, Nagano 3908621, Japan
[3] Shinshu Univ, Cooperat Res Ctr, Nagano 3808553, Japan
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2003年 / 651卷
关键词：
THz time domain spectroscopy; boson peak; polymethyl methacrylate; dielectric constants; Raman scattering;
D O I：
10.1016/S0022-2860(02)00641-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Using THz time domain spectroscopy we have observed both the real and the imaginary parts of complex dielectric constants in the far-infrared region for a glassy polymethyl methacrylate (PMMA). The intensity and phase of transmittance of PMMA were accurately measured in the frequency range between 5 and 110 cm(-1). The strong absorption appeared around a boson peak (BP) frequency, which was also observed by Raman scattering. The broad peak of an imaginary part related to BP shows a similar line-shape to the reduced depolarized Raman spectrum. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：285 / 288
页数：4
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