2016/11/30 by Lei Wei, Nandini Bhattacharya, H. P. Urbach +1 · 22 citations
Engineering · Physics and Astronomy · #Amplitude #Beam (structure) #Dielectric #Dipole #Excitation #Light scattering #Magnetic dipole #Near-Field Optical Microscopy #Optical vortex #Optics #Optoelectronics #Orbital Angular Momentum in Optics #Phase (matter) #Physics #Plasmonic and Surface Plasmon Research #Polarization (electrochemistry) #Scattering #Wavelength #physics.optics
paper · pdf · doi:10.1364/ol.42.001776
published in Optics Letters 42(9), 1776 (Optica Publishing Group)
arxiv created 2016/12/05 · openalex publication_date 2017/04/24 · arxiv updated 2017/04/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.