2015/10/05 by Zheng Xi, Z. Xi, Lei Wei +3 · 2 citations
Engineering · Materials Science · Physics and Astronomy · #Antenna (radio) #Azimuth #Broadband #Dipole #Forward scatter #Light scattering #Magnetic dipole #Metamaterials and Metasurfaces Applications #Photonic Crystals and Applications #Plasmonic and Surface Plasmon Research #Polarization (electrochemistry) #Scattering #Wavelength #physics.optics
paper · pdf · doi:10.1364/ol.41.000033
arxiv created 2015/10/05 · openalex publication_date 2015/12/16 · arxiv updated 2016/01/20 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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.