Near-infrared trapped mode magnetic resonance in an all-dielectric metamaterial
Near-infrared trapped mode magnetic resonance in an all-dielectric metamaterial
Optical responses in conventional metamaterials based on plasmonic metal nanostructures are inevitably accompanied by Joule losses, which obstruct practical applications by limiting resonance quality factors and compromising the efficiency of metamaterial devices. Here we experimentally demonstrate a fully-dielectric metamaterial that exhibits a ‘trapped mode’ resonance at optical frequencies, founded upon the excitation by incident light of anti-parallel displacement currents in meta-molecules comprising pairs of parallel, geometrically dissimilar dielectric nano-bars. The phenomenon is demonstrated in the near-infrared part of the spectrum using silicon, showing that in principle strong, lossless resonant responses are possible anywhere in the optical spectral range.
26721-26728
Zhang, Jianfa
7ce15288-2016-4b9c-8244-7aed073363ca
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
4 November 2013
Zhang, Jianfa
7ce15288-2016-4b9c-8244-7aed073363ca
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Zhang, Jianfa, MacDonald, Kevin F. and Zheludev, Nikolay I.
(2013)
Near-infrared trapped mode magnetic resonance in an all-dielectric metamaterial.
Optics Express, 21 (22), .
(doi:10.1364/OE.21.026721).
(PMID:24216893)
Abstract
Optical responses in conventional metamaterials based on plasmonic metal nanostructures are inevitably accompanied by Joule losses, which obstruct practical applications by limiting resonance quality factors and compromising the efficiency of metamaterial devices. Here we experimentally demonstrate a fully-dielectric metamaterial that exhibits a ‘trapped mode’ resonance at optical frequencies, founded upon the excitation by incident light of anti-parallel displacement currents in meta-molecules comprising pairs of parallel, geometrically dissimilar dielectric nano-bars. The phenomenon is demonstrated in the near-infrared part of the spectrum using silicon, showing that in principle strong, lossless resonant responses are possible anywhere in the optical spectral range.
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e-pub ahead of print date: 29 October 2013
Published date: 4 November 2013
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 361247
URI: http://eprints.soton.ac.uk/id/eprint/361247
ISSN: 1094-4087
PURE UUID: e47e5ef4-27eb-4518-8376-a38a2c9afad7
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Date deposited: 16 Jan 2014 11:38
Last modified: 15 Mar 2024 03:03
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Author:
Jianfa Zhang
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