Electromagnetic toroidal excitations in matter and free space
Electromagnetic toroidal excitations in matter and free space
The toroidal dipole is a localized electromagnetic excitation, distinct from the magnetic and electric dipoles. While the electric dipole can be understood as a pair of opposite charges and the magnetic dipole as a current loop, the toroidal dipole corresponds to currents flowing on the surface of a torus. Toroidal dipoles provide physically significant contributions to the basic characteristics of matter including absorption, dispersion and optical activity. Toroidal excitations also exist in free space as spatially and temporally localized electromagnetic pulses propagating at the speed of light and interacting with matter. We review recent experimental observations of resonant toroidal dipole excitations in metamaterials and the discovery of anapoles, non-radiating current configurations involving toroidal dipoles. While certain fundamental and practical aspects of toroidal electrodynamics remain open for the moment, we envision that exploitation of toroidal excitations can have important implications for the fields of photonics, sensing, energy and information.
263-271
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Raybould, T.A.
cd82c867-4261-44fa-ac5e-b1e537b6958f
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
March 2016
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Savinov, V.
147c7954-4636-4438-a305-cd78539f7c0a
Raybould, T.A.
cd82c867-4261-44fa-ac5e-b1e537b6958f
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Papasimakis, N., Fedotov, V.A., Savinov, V., Raybould, T.A. and Zheludev, N.I.
(2016)
Electromagnetic toroidal excitations in matter and free space.
Nature Materials, 15 (3), .
(doi:10.1038/NMAT4563).
Abstract
The toroidal dipole is a localized electromagnetic excitation, distinct from the magnetic and electric dipoles. While the electric dipole can be understood as a pair of opposite charges and the magnetic dipole as a current loop, the toroidal dipole corresponds to currents flowing on the surface of a torus. Toroidal dipoles provide physically significant contributions to the basic characteristics of matter including absorption, dispersion and optical activity. Toroidal excitations also exist in free space as spatially and temporally localized electromagnetic pulses propagating at the speed of light and interacting with matter. We review recent experimental observations of resonant toroidal dipole excitations in metamaterials and the discovery of anapoles, non-radiating current configurations involving toroidal dipoles. While certain fundamental and practical aspects of toroidal electrodynamics remain open for the moment, we envision that exploitation of toroidal excitations can have important implications for the fields of photonics, sensing, energy and information.
Text
accepted_version.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 8 January 2016
e-pub ahead of print date: 24 February 2016
Published date: March 2016
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 380437
URI: http://eprints.soton.ac.uk/id/eprint/380437
ISSN: 1476-1122
PURE UUID: 019a6bba-2bd5-45e2-8851-6c1ed90c99e2
Catalogue record
Date deposited: 15 Sep 2015 08:52
Last modified: 15 Mar 2024 03:35
Export record
Altmetrics
Contributors
Author:
V.A. Fedotov
Author:
V. Savinov
Author:
T.A. Raybould
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics