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Resonant transparency and non-trivial non-radiating excitations in toroidal metamaterials

Resonant transparency and non-trivial non-radiating excitations in toroidal metamaterials
Resonant transparency and non-trivial non-radiating excitations in toroidal metamaterials
Engaging strongly resonant interactions allows dramatic enhancement of functionalities of many electromagnetic devices. However, resonances can be dampened by Joule and radiation losses. While in many cases Joule losses may be minimized by the choice of constituting materials, controlling radiation losses is often a bigger problem. Recent solutions include the use of coupled radiant and sub-radiant modes yielding narrow asymmetric Fano resonances in a wide range of systems, from defect states in photonic crystals and optical waveguides with mesoscopic ring resonators to nanoscale plasmonic and metamaterial systems exhibiting interference effects akin to electromagnetically-induced transparency. Here we demonstrate theoretically and confirm experimentally a new mechanism of resonant electromagnetic transparency, which yields very narrow isolated symmetric Lorentzian transmission lines in toroidal metamaterials. It exploits the long sought non-trivial non-radiating charge-current excitation based on interfering electric and toroidal dipoles that was first proposed by Afanasiev and Stepanovsky in [J. Phys. A Math. Gen. 28, 4565 (1995)]
2967
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Rogacheva, A.V.
07e3c6ce-4e4d-4660-87fd-b04e7061b3ee
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Rogacheva, A.V.
07e3c6ce-4e4d-4660-87fd-b04e7061b3ee
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Fedotov, V.A., Rogacheva, A.V., Savinov, V., Tsai, D.P. and Zheludev, N.I. (2013) Resonant transparency and non-trivial non-radiating excitations in toroidal metamaterials. Scientific Reports, 3, 2967. (doi:10.1038/srep02967).

Record type: Article

Abstract

Engaging strongly resonant interactions allows dramatic enhancement of functionalities of many electromagnetic devices. However, resonances can be dampened by Joule and radiation losses. While in many cases Joule losses may be minimized by the choice of constituting materials, controlling radiation losses is often a bigger problem. Recent solutions include the use of coupled radiant and sub-radiant modes yielding narrow asymmetric Fano resonances in a wide range of systems, from defect states in photonic crystals and optical waveguides with mesoscopic ring resonators to nanoscale plasmonic and metamaterial systems exhibiting interference effects akin to electromagnetically-induced transparency. Here we demonstrate theoretically and confirm experimentally a new mechanism of resonant electromagnetic transparency, which yields very narrow isolated symmetric Lorentzian transmission lines in toroidal metamaterials. It exploits the long sought non-trivial non-radiating charge-current excitation based on interfering electric and toroidal dipoles that was first proposed by Afanasiev and Stepanovsky in [J. Phys. A Math. Gen. 28, 4565 (1995)]

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More information

Published date: 2013
Organisations: Optoelectronics Research Centre, Electronics & Computer Science

Identifiers

Local EPrints ID: 359640
URI: https://eprints.soton.ac.uk/id/eprint/359640
PURE UUID: 38417589-6d81-4387-b3c0-644d7beac5d3
ORCID for V. 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: 07 Nov 2013 14:15
Last modified: 03 Dec 2019 02:03

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Contributors

Author: V.A. Fedotov
Author: A.V. Rogacheva
Author: V. Savinov ORCID iD
Author: D.P. Tsai
Author: N.I. Zheludev ORCID iD

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