Tuneable, Anomalous Mie Scattering Using Partial Coherence

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Important Dates

Conference:

Aug. 18-20, 2018

Full Paper Due: Jul. 20, 2018

Abstract Due: Jul. 20, 2018

Audience Registration Due:
Aug. 18, 2018

Presentations of The Int'l Symposium on Photonics and Optoelectronics (SOPO 2016)

● Tuneable, Anomalous Mie Scattering Using Partial Coherence
Author(s)
Yundou Yang Wang
Affiliation(s)
Northwestern Polytechnical University
KEYWORDS
Tuneable, Partial Coherence
ABSTRACT
In 1908, Gustav Mie [1] obtained, on the basis of Maxwell's equations, a rigorous solution for the di raction of a plane monochromatic wave by a homogeneous sphere of any diameter and of any com- position situated in a homogeneous medium. After that, a large number of studies have been devoted to the question of how the angular distribution of elds scattered by a sphere can be controlled. This line of research was initiated by Kerker et al. in 1983 [2]. They derived conditions under which the forward or backward scattering by magnetic spheres is strongly suppressed. Here we show that a J0 Bessel-correlated beam which is incident on a homogeneous sphere, pro- duces a highly unusual distribution of the scattered eld [3{5]. Such beams can be easily generated using an incoherent annular source [6]. The forward scattered intensity can be reduced by more than ve orders of magnitude compared to the case of an incident eld that is spatially fully coherent. Strong suppression can also be obtained for the backward scattered eld by tuning the spatial co- herence properties of the incident eld. This method allows the creation of cone-like scattered elds, with the angle of maximum intensity given by a simple formula.