Terahertz time-domain spectroscopy of low-energy excitations in glasses

被引：29

作者：

Kojima, S ^{[1
]}

Kitahara, H

Nishizawa, S

Yang, YS

Takeda, MW

机构：

[1] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan

[2] Shinshu Univ, Fac Sci, Dept Phys, Nagano 3908621, Japan

[3] JST, AISPEC, Preventure Prog Off Tech Transfer, Hachioji, Tokyo 1930836, Japan

[4] Pusan Natl Univ, RCDAMP, Pusan 609735, South Korea

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2005年 / 744卷

关键词：

low-energy excitation; silica glass; borate glass; polycarbonate; terahertz spectroscopy;

D O I：

10.1016/j.molstruc.2004.10.045

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 [物理化学]; 081704 [应用化学];

摘要：

The low-energy excitations in glasses were studied by the terahertz time-domain spectroscopy (THz-TDS). The coherent THz radiation by a femto-second pulse laser enables the determination of the real and the imaginary parts of complex dielectric constants in the frequency range between 0.3 and 2.4 THz. The complex dielectric spectra of glasses clearly show the existence of broad low-energy excitations called boson peaks. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：243 / 246

页数：4

共 17 条

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Phonon interpretation of the 'boson peak' in supercooled liquids [J].