Effects of the anisotropy factor of scattering and the finite spatial coherence length of light source on enhanced backscattering

Prabhakar Pradhan*, Young L. Kim, Hariharan Subramanian, Vadim Backman

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Enhanced backscattering (EBS) of light (also known as coherent backscattering) is a constructive self-interference effect in the backscattered direction due to the photons traveling along time-reversed paths in a disordered medium. EBS can be used for characterization of disordered media and recently been used in cancer detection. Conventional BBS is determined by the scattering transport mean free path of the medium. However, the properties of BBS become more complex and richer in case of anisotropy of scattering (anisotropy factor g>0)and finite spatial coherence length (Lsc) of a light source. We report our experimental and numerical studies of the effects of g and Lsc on BBS. We demonstrate for the first time that the profile of the BBS peak varies non-monotonically with mean free path length ls, and is a double valued function of ls for a range of values of Lsc and g. Hence, the value of g can be extracted from the EBS profile, which may provide important and previously unattainable information about biological tissue in situ.

Original languageEnglish (US)
Title of host publicationProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume6091
StatePublished - May 8 2006
EventOptical Biopsy VI - San Jose, CA, United States
Duration: Jan 24 2006Jan 24 2006

Other

OtherOptical Biopsy VI
CountryUnited States
CitySan Jose, CA
Period1/24/061/24/06

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

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    Pradhan, P., Kim, Y. L., Subramanian, H., & Backman, V. (2006). Effects of the anisotropy factor of scattering and the finite spatial coherence length of light source on enhanced backscattering. In Progress in Biomedical Optics and Imaging - Proceedings of SPIE (Vol. 6091)