Time reversal of electromagnetic waves

被引：515

作者：

Lerosey, G ^{[1
]}

de Rosny, J ^{[1
]}

Tourin, A ^{[1
]}

Derode, A ^{[1
]}

Montaldo, G ^{[1
]}

Fink, M ^{[1
]}

机构：

[1] Univ Paris 07, ESPCI, Lab Ondes & Acoust, UMR 7587, F-75005 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.92.193904

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first experimental demonstration of time-reversal focusing with electromagnetic waves. An antenna transmits a 1-mus electromagnetic pulse at a central frequency of 2.45 GHz in a high-Q cavity. Another antenna records the strongly reverberated signal. The time-reversed wave is built and transmitted back by the same antenna acting now as a time-reversal mirror. The wave is found to converge to its initial source and is compressed in time. The quality of focusing is determined by the frequency bandwidth and the spectral correlations of the field within the cavity.

引用

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页码：193904 / 1

页数：3

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