Coherence vortices in Mie scattering of statistically stationary partially coherent fields.
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.
Marasinghe
Madara L
ML
Advanced Computing and Simulation Laboratory, Department of Electrical and Computer Systems Engineering, Monash University, Clayton, Victoria 3800, Australia. madara.marasinghe@eng.monash.edu.au
Premaratne
Malin
M
Paganin
David M
DM
D000465:Algorithms; D003198:Computer Simulation; D004574:Electromagnetic Fields; D055590:Electromagnetic Phenomena; D007090:Image Interpretation, Computer-Assisted; D007834:Lasers; D015233:Models, Statistical; D008962:Models, Theoretical; D055095:Optics and Photonics; D012542:Scattering, Radiation