Magneto-optical response in bimetallic metamaterials

Atmatzakis, Evangelos, Papasimakis, Nikitas, Fedotov, Vassili and Vienne, Guillaume (2018) Magneto-optical response in bimetallic metamaterials. Nanophotonics, 7 (1), 199-2-6. (doi:10.1515/nanoph-2016-0162).

Record type: Article

Abstract

We demonstrate resonant Faraday polarization rotation in plasmonic arrays of bimetallic nanoring resonators consisting of Au and Ni sections. This metamaterial design allows to optimize the trade-off between the enhancement of magneto-optical effects and plasmonic dissipation. Although Ni sections correspond to as little as ~ 6% of the total surface of the metamaterial, the resulting magneto-optically induced polarization rotation is equal to that of a continuous film. Such bimetallic metamaterials can be used in compact magnetic sensors, active plasmonic components and integrated photonic circuits.

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