Toroidal dipolar response in a metamaterial
Toroidal dipolar response in a metamaterial
Toroidal multipoles are fundamental electromagnetic excitations different from those associated with the familiar charge and magnetic multipoles. They have been held responsible for parity violation in nuclear and particle physics, but direct evidence of their existence in classical electrodynamics has remained elusive. We report on the observation of a resonant electromagnetic response in an artificially engineered medium, or metamaterial, that cannot be attributed to magnetic or charge multipoles and can only be explained by the existence of a toroidal dipole. Our direct experimental evidence of the toroidal response brings attention to the often ignored electromagnetic interactions involving toroidal multipoles, which could be present in naturally occurring systems, especially at the macromolecule level, where toroidal symmetry is ubiquitous.
1510-1512
Kaelberer, T.
b900929b-dc58-4699-a43b-de2c35c3ab40
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
December 2010
Kaelberer, T.
b900929b-dc58-4699-a43b-de2c35c3ab40
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Tsai, D.P.
ac188460-c076-41ee-bce4-7aa873f757e3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Kaelberer, T., Fedotov, V.A., Papasimakis, N., Tsai, D.P. and Zheludev, N.I.
(2010)
Toroidal dipolar response in a metamaterial.
Science, 330 (6010), .
(doi:10.1126/science.1197172).
Abstract
Toroidal multipoles are fundamental electromagnetic excitations different from those associated with the familiar charge and magnetic multipoles. They have been held responsible for parity violation in nuclear and particle physics, but direct evidence of their existence in classical electrodynamics has remained elusive. We report on the observation of a resonant electromagnetic response in an artificially engineered medium, or metamaterial, that cannot be attributed to magnetic or charge multipoles and can only be explained by the existence of a toroidal dipole. Our direct experimental evidence of the toroidal response brings attention to the often ignored electromagnetic interactions involving toroidal multipoles, which could be present in naturally occurring systems, especially at the macromolecule level, where toroidal symmetry is ubiquitous.
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Published date: December 2010
Organisations:
Optoelectronics Research Centre, Physics & Astronomy
Identifiers
Local EPrints ID: 176849
URI: http://eprints.soton.ac.uk/id/eprint/176849
ISSN: 0036-8075
PURE UUID: 154e4b93-b4b7-4c44-bb6d-86f36667a922
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Date deposited: 11 Mar 2011 14:07
Last modified: 15 Mar 2024 02:44
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Contributors
Author:
T. Kaelberer
Author:
V.A. Fedotov
Author:
N. Papasimakis
Author:
D.P. Tsai
Author:
N.I. Zheludev
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