Enhanced backscattering and modal echo of reverberant elastic waves

被引：43

作者：

Weaver, RL ^{[1
]}

Lobkis, OI ^{[1
]}

机构：

[1] Univ Illinois, Dept Theoret & Appl Mech, Urbana, IL 61801 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.84.4942

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report experimental evidence for coherent backscattering of waves in a three-dimensional elastic body. Ultrasonic spectral energy density consequent to a transient excitation is measured us a function of time and of distance from the source. In accord with the predictions of random matrix theory, an enhancement is found near the sourer by a weak localization factor of 2 at early times, but a factor of 3 at late rimes. The effect appears to be independent of absorption.

引用

页码：4942 / 4945

页数：4

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