Hypersound damping in vitreous silica measured by picosecond acoustics

被引：73

作者：

Devos, A. ^{[1
]}

Foret, M. ^{[2
]}

Ayrinhac, S. ^{[2
]}

Emery, P. ^{[3
]}

Ruffle, B. ^{[2
]}

机构：

[1] CNRS, UMR 8250, Inst Elect Microelect & Nanotechnol, F-59652 Villeneuve Dascq, France

[2] Univ Montpellier 2, CNRS, UMR 5587, Lab Colloides Verres & Nanomat, F-34095 Montpellier 5, France

[3] ST Microelect, F-38926 Crolles, France

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.77.100201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The attenuation of longitudinal acoustic phonons up to frequencies nearing 250 GHz is measured in vitreous silica with a picosecond optical technique. By taking advantage of interferences on the probe beam, difficulties encountered in early pioneering experiments are alleviated. Sound damping at 250 GHz and room temperature is consistent with relaxation dominated by anharmonic interactions with the thermal bath, extending optical Brillouin scattering data. Our result is at variance with claims of a recent deep-UV experiment which reported a rapid damping increase beyond 100 GHz. A comprehensive picture of the frequency dependence of sound attenuation in nu-SiO2 can be proposed.

引用

页数：4

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