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3D metamaterials: Erected U-shaped nano-rings and plasmonic toroidal metamaterials at optical frequencies

3D metamaterials: Erected U-shaped nano-rings and plasmonic toroidal metamaterials at optical frequencies
3D metamaterials: Erected U-shaped nano-rings and plasmonic toroidal metamaterials at optical frequencies
Split ring resonators (SRRs) were shown to exhibit electric and magnetic resonances from micro wave to visible light region in the past decade. Owing to the fabrication challenge, so far most SRRs structures were fabricated in planar type, i.e. SRRs laying on a supporting substrate. Here we fabricate the three-dimensional meta-molecule consisted of an array of erected SRRs structure and investigate the plasmonic resonance modes both by finite-element simulations and optical measurements, which are in excellent agreement with each other [1]. Using the double exposure electron beam lithography process with precise alignment technique (under 10 nm misalignment), the erected U-shape gold SRRs structures were fabricated on a glass substrate to study the plasmonic resonant modes of three dimensional metamaterials. We find electromagnetic field can be enhanced either between two prongs oraround two prongs of the erected U-shaped gold nano-rings corresponding to different plasmonic modes. The electromagnetic interaction of arranging four three-dimensional SRRs also results in extraordinary electromagnetic properties, such as toroidal dipole response [2]. The plasmonic toroidal spectral responses of solenoid-like toroidal metamolecule integrated by four erected U-shaped gold nano-rings at optical frequencies are experimentally and numerically studied at optical frequencies [3]. We propose a physical model based on coupled LC circuits to quantitatively analyze the coupled system and energy splitting of the plasmonic toroidal metamaterials. The gain-assistant optical spectra for toroidal resonance are also studied. These research results have potential to be applied in the area such as integrated photonic circuit, plasmonic biosensor and toroidal lasing spaser in optical frequency region.
Chen, W.T.
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Wu, P.C.
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Huang, Y.W.
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Hsiao, C.T.
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Yang, K.-Y.
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Liao, C.Y.
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Fedotov, V.
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Savinov, Vassili
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Zheludev, N.I.
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Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3
Chen, W.T.
e1e9d172-77bb-47a4-a91e-57d017b381b4
Wu, P.C.
eec3ecd5-e90b-432a-922d-c6adf0b70b66
Huang, Y.W.
10ba2e33-365d-49c3-b27f-f67cc816a681
Hsiao, C.T.
d0256362-0e66-46ca-80d7-f0ea7ccec377
Yang, K.-Y.
4a711ec1-e908-4c2c-8e41-bc4ee4c989cc
Liao, C.Y.
dac84f98-82c5-41d8-94d7-9da03c2ed047
Fedotov, V.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3

Chen, W.T., Wu, P.C., Huang, Y.W., Hsiao, C.T., Yang, K.-Y., Liao, C.Y., Fedotov, V., Savinov, Vassili, Zheludev, N.I. and Tsai, D.P. (2012) 3D metamaterials: Erected U-shaped nano-rings and plasmonic toroidal metamaterials at optical frequencies. E-MRS '12 Symposium on Control of light at the nanoscale:materials, techniques and applications, France. 14 - 18 May 2012.

Record type: Conference or Workshop Item (Paper)

Abstract

Split ring resonators (SRRs) were shown to exhibit electric and magnetic resonances from micro wave to visible light region in the past decade. Owing to the fabrication challenge, so far most SRRs structures were fabricated in planar type, i.e. SRRs laying on a supporting substrate. Here we fabricate the three-dimensional meta-molecule consisted of an array of erected SRRs structure and investigate the plasmonic resonance modes both by finite-element simulations and optical measurements, which are in excellent agreement with each other [1]. Using the double exposure electron beam lithography process with precise alignment technique (under 10 nm misalignment), the erected U-shape gold SRRs structures were fabricated on a glass substrate to study the plasmonic resonant modes of three dimensional metamaterials. We find electromagnetic field can be enhanced either between two prongs oraround two prongs of the erected U-shaped gold nano-rings corresponding to different plasmonic modes. The electromagnetic interaction of arranging four three-dimensional SRRs also results in extraordinary electromagnetic properties, such as toroidal dipole response [2]. The plasmonic toroidal spectral responses of solenoid-like toroidal metamolecule integrated by four erected U-shaped gold nano-rings at optical frequencies are experimentally and numerically studied at optical frequencies [3]. We propose a physical model based on coupled LC circuits to quantitatively analyze the coupled system and energy splitting of the plasmonic toroidal metamaterials. The gain-assistant optical spectra for toroidal resonance are also studied. These research results have potential to be applied in the area such as integrated photonic circuit, plasmonic biosensor and toroidal lasing spaser in optical frequency region.

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More information

Published date: 2012
Venue - Dates: E-MRS '12 Symposium on Control of light at the nanoscale:materials, techniques and applications, France, 2012-05-14 - 2012-05-18
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 375945
URI: https://eprints.soton.ac.uk/id/eprint/375945
PURE UUID: c3c40126-f869-4072-84c7-cd0c7ca4bf96
ORCID for Vassili Savinov: ORCID iD orcid.org/0000-0001-7203-7222
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 22 Apr 2015 13:45
Last modified: 02 Aug 2019 00:36

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