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Gyrotropy of a metamolecule: wire on a torus

Gyrotropy of a metamolecule: wire on a torus
Gyrotropy of a metamolecule: wire on a torus
Sharing topology with numerous organic molecules, a wire helix bend into a torus gives a curious object with a gyrotropic behavior which is far from obvious. While a continuous constant current in opposite sections of the torus would create mutually cancelling contributions to its gyrotropic response, an array of tori can show strong circular dichroism linked to the excitation of standing current waves. Here we present the experimental study of optical activity in a chiral toroidal metamaterial and discuss its response in terms of multipole moments, including the elusive toroidal moment.
0031-9007
93901
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Marinov, K.
9cd1e0a3-6dd8-4acf-b33b-3a47d070fcb3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Papasimakis, N.
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Fedotov, V.A.
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Marinov, K.
9cd1e0a3-6dd8-4acf-b33b-3a47d070fcb3
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Papasimakis, N., Fedotov, V.A., Marinov, K. and Zheludev, N.I. (2009) Gyrotropy of a metamolecule: wire on a torus. Physical Review Letters, 103 (9), 93901. (doi:10.1103/PhysRevLett.103.093901).

Record type: Article

Abstract

Sharing topology with numerous organic molecules, a wire helix bend into a torus gives a curious object with a gyrotropic behavior which is far from obvious. While a continuous constant current in opposite sections of the torus would create mutually cancelling contributions to its gyrotropic response, an array of tori can show strong circular dichroism linked to the excitation of standing current waves. Here we present the experimental study of optical activity in a chiral toroidal metamaterial and discuss its response in terms of multipole moments, including the elusive toroidal moment.

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Published date: August 2009

Identifiers

Local EPrints ID: 78869
URI: https://eprints.soton.ac.uk/id/eprint/78869
ISSN: 0031-9007
PURE UUID: 7a2aa452-dd72-4e8b-ad85-978a264f5bad
ORCID for N. Papasimakis: ORCID iD orcid.org/0000-0002-6347-6466
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 15 Mar 2010
Last modified: 26 Nov 2019 02:03

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Contributors

Author: N. Papasimakis ORCID iD
Author: V.A. Fedotov
Author: K. Marinov
Author: N.I. Zheludev ORCID iD

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