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Opt Express. 2010 Mar 29;18(7):6628-41. doi: 10.1364/OE.18.006628.

Coherence vortices in Mie scattering of statistically stationary partially coherent fields.

Author information

  • 1Advanced Computing and Simulation Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria 3800, Australia. madara.marasinghe@eng.monash.edu.au

Abstract

Points within a fully coherent complex scalar optical field, where the amplitude is identically zero but the optical phase has a jump discontinuity, have been widely investigated by the singular-optics community. More recent researches have extended the domain of singular optics to include partially coherent fields. For example, in coherence vortices the phase of the two-point spectral degree of coherence of a partially coherent field exhibits vortex structure around a point where the magnitude of the spectral degree of coherence vanishes. We show that the spectral degree of coherence of Mie scattered partially coherent statistically stationary electromagnetic fields exhibits a rich set of coherence vortices in both the internal and external fields. Specifically, we look at Mie scattering of a stationary beam from a dielectric sphere and study the formation of coherence vortices and their evolution with both the properties of the scattering sphere, and of the incident partially coherent beam.

PMID:
20389687
[PubMed - indexed for MEDLINE]
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