Imaging acoustic waves in microscopic wedges

被引：9

作者：

Tomoda, Motonobu ^{[1
]}

Matsueda, Shinnosuke ^{[1
]}

Otsuka, Paul H. ^{[1
]}

Matsuda, Osamu ^{[1
]}

Veres, Istvan A. ^{[2
]}

Gusev, Vitalyi E. ^{[3
]}

Wright, Oliver B. ^{[1
]}

机构：

[1] Hokkaido Univ, Div Appl Phys, Fac Engn, Sapporo, Hokkaido 0608628, Japan

[2] Res Ctr Nondestruct Testing GmbH, A-4040 Linz, Austria

[3] Univ Maine, CNRS, LAUM UMR 6613, LUNAM Univ, F-72085 Le Mans, France

来源：

NEW JOURNAL OF PHYSICS | 2014年 / 16卷

基金：

日本学术振兴会;

关键词：

wedge; Lamb waves; acoustics; imaging; ultrafast; THIN-FILMS; FLEXURAL WAVES; MODES; IMPERFECTIONS; PROPAGATION; GUIDE;

D O I：

10.1088/1367-2630/16/10/103029

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using an ultrafast optical technique we image near-gigahertz flexural acoustic waves propagating in a thin gold wedge deposited on an ultrathin silicon nitride slab. Temporal Fourier transforms of the imaged data in two dimensions allow individual frequencies to be accessed. The wave fronts associated with antisymmetric Lamb waves bend towards the thin end of the wedge. This behaviour is mimicked with an analytical model based on sections of a linear wedge. We also conduct numerical simulations which show good agreement with the experimental results.

引用

页数：9

共 31 条

[1]

Anderson O.L., 1965, Physical Acoustics, V3

[2]

[Anonymous], P S ULTR EL

[3] Experimental Study of Vibration Damping in a Modified Elastic Wedge of Power-Law Profile [J].