The University of Southampton
University of Southampton Institutional Repository

Exciting dynamic anapoles with electromagnetic doughnut pulses

Exciting dynamic anapoles with electromagnetic doughnut pulses
Exciting dynamic anapoles with electromagnetic doughnut pulses
As was predicted in 1995 by Afanasiev and Stepanovsky, a superposition of electric and toroidal dipoles can lead to a non-trivial non-radiating charge current-configuration, the dynamic anapole. The dynamic anapoles were recently observed first in microwave metamaterials and then in dielectric nanodisks. However, spectroscopic studies of toroidal dipole and anapole excitations are challenging owing to their diminishing coupling to transverse electromagnetic waves. Here, we show that anapoles can be excited by electromagnetic Flying Doughnut (FD) pulses. First described by Helwarth and Nouchi in 1996, FD pulses (also known as "Flying Toroids") are space-time inseparable exact solutions to Maxwell's equations that have toroidal topology and propagate in free-space at the speed of light. We argue that FD pulses can be used as a diagnostic and spectroscopic tool for the dynamic anapole excitations in matter.
0003-6951
Raybould, Timothy, Andrew
cd82c867-4261-44fa-ac5e-b1e537b6958f
Fedotov, Vassili
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Youngs, I.
a057ce4a-7764-45c3-9b08-55ac3e6765e6
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Raybould, Timothy, Andrew
cd82c867-4261-44fa-ac5e-b1e537b6958f
Fedotov, Vassili
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Youngs, I.
a057ce4a-7764-45c3-9b08-55ac3e6765e6
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6

Raybould, Timothy, Andrew, Fedotov, Vassili, Papasimakis, Nikitas, Youngs, I. and Zheludev, Nikolai (2017) Exciting dynamic anapoles with electromagnetic doughnut pulses. Applied Physics Letters, 111 (8), [081104]. (doi:10.1063/1.4999368).

Record type: Article

Abstract

As was predicted in 1995 by Afanasiev and Stepanovsky, a superposition of electric and toroidal dipoles can lead to a non-trivial non-radiating charge current-configuration, the dynamic anapole. The dynamic anapoles were recently observed first in microwave metamaterials and then in dielectric nanodisks. However, spectroscopic studies of toroidal dipole and anapole excitations are challenging owing to their diminishing coupling to transverse electromagnetic waves. Here, we show that anapoles can be excited by electromagnetic Flying Doughnut (FD) pulses. First described by Helwarth and Nouchi in 1996, FD pulses (also known as "Flying Toroids") are space-time inseparable exact solutions to Maxwell's equations that have toroidal topology and propagate in free-space at the speed of light. We argue that FD pulses can be used as a diagnostic and spectroscopic tool for the dynamic anapole excitations in matter.

Text
FD_Tor_APL_revisionII_v1 - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 14 July 2017
e-pub ahead of print date: 21 August 2017
Published date: August 2017

Identifiers

Local EPrints ID: 412700
URI: http://eprints.soton.ac.uk/id/eprint/412700
ISSN: 0003-6951
PURE UUID: e0cbcddb-8c99-431d-a0a2-cde1fe2fc49d
ORCID for Nikitas Papasimakis: ORCID iD orcid.org/0000-0002-6347-6466
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 26 Jul 2017 16:31
Last modified: 27 Jan 2020 13:42

Export record

Altmetrics

Contributors

Author: Timothy, Andrew Raybould
Author: Vassili Fedotov
Author: I. Youngs

University divisions

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

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×