Broadband active tuning of unidirectional scattering from nanoantenna using combined radially and azimuthally polarized beams

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18 Citations (Scopus)

Abstract

We propose an approach to actively tune the scattering pat-tern of a Mie-type spherical antenna. The scheme is basedon separate control over the induced electric dipole and in-duced magnetic dipole using two coherent focused beams ofradial polarization and azimuthal polarization, respectively.By carefully tuning the amplitude and phase relation of thetwo beams, a broadband unidirectional scattering can beachieved, even at the antenna’s resonant wavelength wherethe antenna scatters efficiently. By moving the focus of onebeam, a drastic switch of the unidirectional scattering canbe observed. Such a scheme enables the design of ultra-compact optical switches and directional couplers basedon nanoantennas.
Original languageEnglish
Pages (from-to)33-36
Number of pages4
JournalOptics Letters
Volume41
Issue number1
DOIs
Publication statusPublished - 2016

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