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Dielectric metamaterials with toroidal dipolar response

Dielectric metamaterials with toroidal dipolar response
Dielectric metamaterials with toroidal dipolar response
Toroidal multipoles are the terms missing in the standard multipole expansion; they are usually overlooked due to their relatively weak coupling to the electromagnetic fields. Here, we propose and theoretically study all-dielectric metamaterials of a special class that represent a simple electromagnetic system supporting toroidal dipolar excitations in the THz part of the spectrum. We show that resonant transmission and reflection of such metamaterials is dominated by toroidal dipole scattering, the neglect of which would result in a misunderstanding interpretation of the metamaterials’ macroscopic response. Because of the unique field configuration of the toroidal mode, the proposed metamaterials could serve as a platform for sensing or enhancement of light absorption and optical nonlinearities.
2160-3308
1-11
Basharin, Alexey A.
8ebcea0b-166c-4c61-bf8c-c375b4a2de1e
Kafesaki, Maria
30e34b40-80fd-4b34-b437-313b67f34d6f
Economou, Eleftherios N.
6b69d3dc-cf11-4203-976b-0932cb82b14a
Soukoulis, Costas M.
0de2cf0a-fdf2-4f08-898a-459004a5656b
Fedotov, Vassili A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Basharin, Alexey A.
8ebcea0b-166c-4c61-bf8c-c375b4a2de1e
Kafesaki, Maria
30e34b40-80fd-4b34-b437-313b67f34d6f
Economou, Eleftherios N.
6b69d3dc-cf11-4203-976b-0932cb82b14a
Soukoulis, Costas M.
0de2cf0a-fdf2-4f08-898a-459004a5656b
Fedotov, Vassili A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Basharin, Alexey A., Kafesaki, Maria, Economou, Eleftherios N., Soukoulis, Costas M., Fedotov, Vassili A., Savinov, Vassili and Zheludev, Nikolay I. (2015) Dielectric metamaterials with toroidal dipolar response. Physical Review X, 5 (1), 1-11. (doi:10.1103/PhysRevX.5.011036).

Record type: Article

Abstract

Toroidal multipoles are the terms missing in the standard multipole expansion; they are usually overlooked due to their relatively weak coupling to the electromagnetic fields. Here, we propose and theoretically study all-dielectric metamaterials of a special class that represent a simple electromagnetic system supporting toroidal dipolar excitations in the THz part of the spectrum. We show that resonant transmission and reflection of such metamaterials is dominated by toroidal dipole scattering, the neglect of which would result in a misunderstanding interpretation of the metamaterials’ macroscopic response. Because of the unique field configuration of the toroidal mode, the proposed metamaterials could serve as a platform for sensing or enhancement of light absorption and optical nonlinearities.

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PhysRevX.5.011036.pdf - Version of Record
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Published date: 27 March 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 375601
URI: https://eprints.soton.ac.uk/id/eprint/375601
ISSN: 2160-3308
PURE UUID: 69583738-8018-462d-928b-b4718c9dac21
ORCID for Vassili Savinov: ORCID iD orcid.org/0000-0001-7203-7222
ORCID for Nikolay I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 10 Apr 2015 08:19
Last modified: 20 Nov 2018 01:36

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