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Active tuning of directional scattering by combining magneto-optical effects and multipolar interferences

Abstract

An efficient route is proposed to actively manipulate directional scattering based on magneto-optical (MO) effects and multipolar interferences with a coated MO cylinder. We demonstrate that the presence of an external magnetic field B contributes to breaking the degeneracy of multipoles and making them rotated. The rotated modes further interfere with each other, thus reshaping scattering profiles and introducing novel directional optical switching (OS) phenomena. As a result, we show that the forward scattering (FS) and backward scattering (BS) can be flexibly altered by turning on or off the B for both polarizations, and the optical switching exhibits broadband performance as well. More specifically, the proposed nanostructure also operates robust and reliable functionalities when considering realistic MO materials with optical loss and dispersion, therefore they are ideal candidates to develop reconfigurable, tunable and versatile optical devices.

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Publication details

The article was accepted on 24 Aug 2018 and first published on 31 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR05692G
Citation: Nanoscale, 2018, Accepted Manuscript
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    Active tuning of directional scattering by combining magneto-optical effects and multipolar interferences

    M. Liu, C. Zhao and B. Wang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR05692G

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