Journal
OPTICS LETTERS
Volume 41, Issue 1, Pages 33-36Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.41.000033
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- NanoNextNL, a micro and nanotechnology consortium of the Government of the Netherlands and 130 partners
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We propose an approach to actively tune the scattering pattern of a Mie-type spherical antenna. The scheme is based on separate control over the induced electric dipole and induced magnetic dipole using two coherent focused beams of radial polarization and azimuthal polarization, respectively. By carefully tuning the amplitude and phase relation of the two beams, a broadband unidirectional scattering can be achieved, even at the antenna's resonant wavelength where the antenna scatters efficiently. By moving the focus of one beam, a drastic switch of the unidirectional scattering can be observed. Such a scheme enables the design of ultra-compact optical switches and directional couplers based on nanoantennas. (C) 2015 Optical Society of America
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