title: Alternate formulation of enhanced backscattering as phase conjugation and diffraction: derivation and experimental observation.
abstract: Enhanced backscattering (EBS), also known as weak localization of light, is derived using the Huygens-Fresnel principle and backscattering is generally shown to be the sum of an incoherent baseline and a phase conjugated portion of the incident wave that forms EBS. The phase conjugated portion is truncated by an effective aperture described by the probability function P(s) of coherent path-pair separations. P(s) is determined by the scattering properties of the medium and so characterization of EBS can be used for metrology of scattering materials. A three dimensional intensity peak is predicted in free space at a point conjugate to the source and is experimentally observed.
authors.affiliation: Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA. jdrogers@northwestern.edu
authors.forename: Jeremy D
authors.initials: JD
authors.lastname: Rogers
authors.forename: Valentina
authors.initials: V
authors.lastname: Stoyneva
authors.forename: Vladimir
authors.initials: V
authors.lastname: Turzhitsky
authors.forename: Nikhil N
authors.initials: NN
authors.lastname: Mutyal
authors.forename: Prabhakar
authors.initials: P
authors.lastname: Pradhan
authors.forename: İlker R
authors.initials: İR
authors.lastname: Çapoğlu
authors.forename: Vadim
authors.initials: V
authors.lastname: Backman
mesh_terms: D016477:Artifacts; D005336:Fiber Optic Technology / Q000379:methods*; D007834:Lasers; D008027:Light; D008962:Models, Theoretical; D009010:Monte Carlo Method; D012542:Scattering, Radiation