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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 22 — Nov. 15, 2013
  • pp: 4750–4753

Angular-domain scattering interferometry

Dustin W. Shipp, Ruobing Qian, and Andrew J. Berger  »View Author Affiliations

Optics Letters, Vol. 38, Issue 22, pp. 4750-4753 (2013)

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We present an angular-scattering optical method that is capable of measuring the mean size of scatterers in static ensembles within a field of view less than 20 μm in diameter. Using interferometry, the method overcomes the inability of intensity-based models to tolerate the large speckle grains associated with such small illumination areas. By first estimating each scatterer’s location, the method can model between-scatterer interference as well as traditional single-particle Mie scattering. Direct angular-domain measurements provide finer angular resolution than digitally transformed image-plane recordings. This increases sensitivity to size-dependent scattering features, enabling more robust size estimates. The sensitivity of these angular-scattering measurements to various sizes of polystyrene beads is demonstrated. Interferometry also allows recovery of the full complex scattered field, including a size-dependent phase profile in the angular-scattering pattern.

© 2013 Optical Society of America

OCIS Codes
(290.5850) Scattering : Scattering, particles
(350.5030) Other areas of optics : Phase
(290.2558) Scattering : Forward scattering

ToC Category:

Original Manuscript: August 19, 2013
Revised Manuscript: October 10, 2013
Manuscript Accepted: October 10, 2013
Published: November 12, 2013

Dustin W. Shipp, Ruobing Qian, and Andrew J. Berger, "Angular-domain scattering interferometry," Opt. Lett. 38, 4750-4753 (2013)

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