Abstract

We describe a method to control the directional scattering of a high-index dielectric nanosphere, which utilizes the unique focusing properties of an azimuthally polarized phase vortex and a radially polarized beam to independently excite inside the nanosphere a spinning magnetic dipole and a linearly polarized electric dipole mode normal to the magnetic dipole. We show that by simply adjusting the phase and amplitude of the field on the exit pupil of the optical system, the scattering of the nanosphere can be tuned to any direction within a plane, and the method works over a broad wavelength range.

© 2017 Optical Society of America

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Supplementary Material (1)

NameDescription
Visualization 1: AVI (10369 KB)      Angular tuning of the directional scattering by changing the phase of the radially polarized pupil field.

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