title: Measurement of the spatial backscattering impulse-response at short length scales with polarized enhanced backscattering.
abstract: In this Letter, we describe an easy to implement technique to measure the spatial backscattering impulse-response at length scales shorter than a transport mean free path with resolution of better than 10 μm using the enhanced backscattering phenomenon. This technique enables spectroscopic measurements throughout the visible range and sensitivity to all polarization channels. Through a combination of Monte Carlo simulations and experimental measurements of latex microspheres, we explore the various sensitivities of our technique to both intrinsic sample properties and extrinsic instrumental properties. We conclude by demonstrating the extraordinary sensitivity of our technique to the shape of the scattering phase function, including higher order shape parameters than the anisotropy factor (or first moment).
authors.affiliation: Biomedical Engineering, Northwestern University, Evanston, Illinois 60208, USA. arad@u.northwestern.edu
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Radosevich
authors.forename: Nikhil N
authors.initials: NN
authors.lastname: Mutyal
authors.forename: Vladimir
authors.initials: V
authors.lastname: Turzhitsky
authors.forename: Jeremy D
authors.initials: JD
authors.lastname: Rogers
authors.forename: Ji
authors.initials: J
authors.lastname: Yi
authors.forename: Allen
authors.initials: A
authors.lastname: Taflove
authors.forename: Vadim
authors.initials: V
authors.lastname: Backman
mesh_terms: D000465:Algorithms; D016880:Anisotropy; D003198:Computer Simulation; D003952:Diagnostic Imaging / Q000379:methods; D004867:Equipment Design; D007834:Lasers; D015233:Models, Statistical; D009010:Monte Carlo Method; D055095:Optics and Photonics; D009991:Oscillometry / Q000379:methods; D012542:Scattering, Radiation; D013053:Spectrophotometry / Q000379:methods