Issue 38, 2018

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 rotate. 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 forward scattering (FS) and backward scattering (BS) can be flexibly altered by turning on or off the B for both s-polarization and p-polarization, and 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.

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

Supplementary files

Article information

Article type
Paper
Submitted
15 Jul 2018
Accepted
24 Aug 2018
First published
31 Aug 2018

Nanoscale, 2018,10, 18282-18290

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

M. Q. Liu, C. Y. Zhao and B. X. Wang, Nanoscale, 2018, 10, 18282 DOI: 10.1039/C8NR05692G

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