Coherent backscattering of an elastic wave in a chaotic cavity
Coherent backscattering of an elastic wave in a chaotic cavity
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DOI：
10.1103/physrevlett.84.1693
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发表时间：
2000-02-21
影响因子：
8.6
通讯作者：
Fink, M
中科院分区：
文献类型：
--
作者：
de Rosny, J;Tourin, A;Fink, M
我们首次报道了二维混沌腔中瞬态弹性波相干后向散射增强的实验证据。点源处的时间积分平方振幅是源周围其他点处的两倍。与类似的光学实验相反，这种效应已经在单个实现中清楚地观察到了。特别是，相干后向散射增强的空间形状很好地预测了现有理论的推广。
We report the first experimental evidence of coherent backscattering enhancement for transient elastic waves propagating in a two-dimensional chaotic cavity. The time-integrated squared amplitude at the point source is twice as large as at the other points around the source. Contrary to analogous optical experiments, this effect is already clearly observable on a single realization. Especially, the spatial shape of the coherent backscattering enhancement is well predicted by a generalization of the existing theory.