Coherent backscattering of ultrasound without a source

E. Larose, O. I. Lobkis, R. L. Weaver

Research output: Contribution to journalArticle

Abstract

Coherent backscattering is due to constructive interferences of reciprocal paths and leads to an enhancement of the intensity of a multiply scattered field near its source. To observe this enhancement an array of receivers is conventionally placed close to the source. Our approach here is different. In a first experiment, we recover the coherent backscattering effect (CBE) within an array of sources and a distant receiver using time correlation of diffuse fields. The enhancement cone has an excellent spatial resolution. The dynamics of the enhancement factor is studied in a second experiment using correlation of thermal phonons at the same ultrasonic frequencies, without any active source.

Original languageEnglish (US)
Pages (from-to)422-428
Number of pages7
JournalEurophysics Letters
Volume76
Issue number3
DOIs
StatePublished - Nov 1 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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