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Electromagnetic Toroidal Excitations in Matter and Free Space

Electromagnetic Toroidal Excitations in Matter and Free Space
Electromagnetic Toroidal Excitations in Matter and Free Space
Data used in Figure 5 (“Focused Doughnut” (FD) pulses) in 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.The toroidal dipole is a localized electromagnetic excitation independent from the familiar magnetic and electric dipoles. While the electric dipole can be understood as separated opposite charges and the magnetic dipole as a current loop, the toroidal dipole corresponds to currents flowing on the surface of a torus. Resonant interactions of induced toroidal dipoles with electromagnetic waves have recently been observed at microwave, terahertz and optical frequencies. They provide distinct and physically significant contributions to the basic characteristics of matter including absorption, dispersion, and optical activity, the origin of which cannot be comprehensively interpreted in the context of standard multipoles alone. Interference of radiating induced toroidal and electric dipoles leads to transparency windows in artificial materials as a manifestation of the dynamic anapole. Toroidal excitations also exist in free-space as spatially and temporally localized electromagnetic pulses propagating at the speed of light and interacting with matter.
University of Southampton
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Fedotov, Vassili
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Raybould, Timothy, Andrew
cd82c867-4261-44fa-ac5e-b1e537b6958f
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Fedotov, Vassili
3725f5cc-2d0b-4e61-95c5-26d187c84f25
Savinov, Vassili
147c7954-4636-4438-a305-cd78539f7c0a
Raybould, Timothy, Andrew
cd82c867-4261-44fa-ac5e-b1e537b6958f
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6

Papasimakis, Nikitas, Fedotov, Vassili, Savinov, Vassili, Raybould, Timothy, Andrew and Zheludev, Nikolai (2015) Electromagnetic Toroidal Excitations in Matter and Free Space. University of Southampton doi:10.5258/SOTON/385194 [Dataset]

Record type: Dataset

Abstract

Data used in Figure 5 (“Focused Doughnut” (FD) pulses) in 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.The toroidal dipole is a localized electromagnetic excitation independent from the familiar magnetic and electric dipoles. While the electric dipole can be understood as separated opposite charges and the magnetic dipole as a current loop, the toroidal dipole corresponds to currents flowing on the surface of a torus. Resonant interactions of induced toroidal dipoles with electromagnetic waves have recently been observed at microwave, terahertz and optical frequencies. They provide distinct and physically significant contributions to the basic characteristics of matter including absorption, dispersion, and optical activity, the origin of which cannot be comprehensively interpreted in the context of standard multipoles alone. Interference of radiating induced toroidal and electric dipoles leads to transparency windows in artificial materials as a manifestation of the dynamic anapole. Toroidal excitations also exist in free-space as spatially and temporally localized electromagnetic pulses propagating at the speed of light and interacting with matter.

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More information

Published date: 2015
Organisations: Optoelectronics Research Centre, ORC Research
Projects:
Nanostructured Photonic Metamaterials
Funded by: UNSPECIFIED (EP/G060363/1)
1 January 2010 to 31 December 2015
NANOSTRUCTURED METAFILMS: A NEW PARADIGM FOR PHOTONICS
Funded by: UNSPECIFIED (EP/G00515X/1)
1 October 2008 to 31 March 2014
Reading the unreadable with metamaterials
Funded by: UNSPECIFIED (EP/M008797/1)
October 2014 to October 2016

Identifiers

Local EPrints ID: 385194
URI: https://eprints.soton.ac.uk/id/eprint/385194
PURE UUID: 2fd8c9cb-ba72-432b-9cea-23286877ed1c
ORCID for Nikitas Papasimakis: ORCID iD orcid.org/0000-0002-6347-6466
ORCID for Vassili Savinov: ORCID iD orcid.org/0000-0001-7203-7222
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 18 Dec 2015 14:34
Last modified: 06 Jun 2018 13:10

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Contributors

Creator: Vassili Fedotov
Creator: Vassili Savinov ORCID iD
Creator: Timothy, Andrew Raybould
Creator: Nikolai Zheludev ORCID iD

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