Origin of low-coherence enhanced backscattering

Optics Letters
Young L KimVadim Backman

Abstract

The origin of low-coherence enhanced backscattering (EBS) of light in random media when the spatial coherence length of illumination is much smaller than the transport mean free path has been poorly understood. We report that in weakly scattering discrete random media low-coherence EBS originates from time-reversed paths of double scattering. Low spatial coherence illumination dephases the time-reversed waves outside its finite coherence area, which isolates the minimal number of scattering events in EBS from higher-order scattering. Moreover, we show the first experimental evidence that the minimal number of scattering events in EBS is double scattering, which has been hypothesized since the first observation of EBS.

References

Mar 1, 1988·Physical Review. B, Condensed Matter· van der Mark MBA Lagendijk
Dec 9, 1985·Physical Review Letters· Van Albada MP, A Lagendijk
Dec 9, 1985·Physical Review Letters·P E Wolf, G Maret
Sep 11, 2004·Optics Letters·Young L KimVadim Backman
Feb 19, 2005·Applied Optics·Young L KimVadim Backman
Apr 19, 2005·Optics Letters·Young L KimVadim Backman
Jul 13, 2005·Optics Letters·Chaim Schwartz, Aristide Dogariu
Mar 15, 1996·Optics Letters·T Okamoto, T Asakura
Aug 1, 1990·Applied Optics·K M YooR R Alfano

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Citations

Jul 14, 2010·Annual Review of Biomedical Engineering·Nada N BoustanyVadim Backman
Dec 8, 2010·Zeitschrift für medizinische Physik·Adolf Friedrich Fercher
Sep 13, 2012·Applied Optics·Renzhe BiKijoon Lee
May 16, 2007·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Hariharan SubramanianVadim Backman

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