Coherence vortices in Mie scattered nonparaxial partially coherent beams

Optics Express
Madara L MarasingheMiguel A Alonso

Abstract

We have previously demonstrated that Mie scattering of partially coherent plane waves can create coherence vortices, namely screw-type dislocations in the phase of the spectral degree of coherence. However, plane waves are an idealization and in practice, optical beams are often much closer to reality. Thus, in this paper, we consider coherence vortices created by Mie scattering of partially coherent focused beams. We demonstrate that Mie scattering of partially coherent complex focused beams can give rise to coherence vortices. As the scattered fields propagate coherence vortex-antivortex pairs are annihilated thus creating hair-pin structures in the coherence-vortex nodal lines. The evolution of correlation singularities in the scattered field with the variation of the complex focus point of the incident beam is also discussed. The variation of the degree of polarization of the scattered field is also studied.

References

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Citations

Jan 11, 2013·Biomedical Optics Express·Debabrata SikdarMalin Premaratne
Nov 10, 2016·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Yechao Liu, Xiangdong Zhang
Feb 12, 2014·Optics Express·Milo W HydeMichael J Havrilla
Feb 7, 2018·Optics Express·J Alejandro Gonzaga-Galeana, Jorge R Zurita-Sánchez
Nov 16, 2018·Optics Letters·Jun Chen, Yao Li
Apr 19, 2013·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Shreyas B RaghunathanTaco D Visser

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