Magneto-optical response in bimetallic metamaterials

Atmatzakis, Evangelos, Papasimakis, Nikitas, Fedotov, Vassili, Vienne, Guillaume and Zheludev, Nikolay I. (2018) Magneto-optical response in bimetallic metamaterials. Nanophotonics, 7 (1), 199-206. (doi:10.1515/nanoph-2016-0162).

Record type: Article

Abstract

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

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Accepted/In Press date: 7 December 2016

e-pub ahead of print date: 22 July 2017

Published date: 1 January 2018

Additional Information: Funding Information: Research Centre and Centre for Photonic Metamaterials, University of Southampton, Southampton SO17 1BJ, UK, e-mail: n.papasimakis@soton.ac.uk Evangelos Atmatzakis and Vassili Fedotov: Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, Southampton SO17 1BJ, UK Guillaume Vienne: Data Storage Institute, Agency for Science, Technology and Research (A*STAR), Singapore 117608, Singapore; and School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore Nikolay I. Zheludev: Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, Southampton SO17 1BJ, UK; and The Photonics Institute and Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore. Acknowledgments: the authors would like to thank Anibal L. Gonzalez Oyarce for his advice on micromagnetic simulations and F. Javier Garcia de Abajo for numerous fruitful discussions. The authors acknowledge the support of the MOE Singapore (grant MOE2011-T3-1-005), the UK’s Engineering and Physical Sciences Research Council (grants EP/G060363/1, EP/M008797/1), and the Leverhulme Trust. The data from this paper can be obtained from the University of Southampton ePrints research repository: http:// dx.doi.org/10.5258/SOTON/405057.

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