title: Determination of particle size by using the angular distribution of backscattered light as measured with low-coherence interferometry.
abstract: We employ a novel interferometer to measure the angular distribution of light backscattered by a turbid medium. Through comparison of the measured data with the predictions of Mie theory, we are able to determine the size of the scatterers comprising the medium with subwavelength precision. As the technique is based on low-coherence interferometry, we are able to examine the evolution of the angular distribution of scattered light as it propagates into the medium. The effects of multiple scattering as a function of penetration depth in the medium are analyzed. We also present various considerations for extending this technique to determining structural information in biological tissues, such as the effects of a distribution of particle sizes and the need to average out speckle contributions.
authors.affiliation: G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge 02139, USA. awax@mit.edu
authors.forename: Adam
authors.initials: A
authors.lastname: Wax
authors.forename: Changhuei
authors.initials: C
authors.lastname: Yang
authors.forename: Vadim
authors.initials: V
authors.lastname: Backman
authors.forename: Maxim
authors.initials: M
authors.lastname: Kalashnikov
authors.forename: Ramachandra R
authors.initials: RR
authors.lastname: Dasari
authors.forename: Michael S
authors.initials: MS
authors.lastname: Feld
mesh_terms: D007368:Interferometry; D008962:Models, Theoretical; D010316:Particle Size; D012542:Scattering, Radiation