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Excitation and detection of toroidal and anapole modes

Excitation and detection of toroidal and anapole modes
Excitation and detection of toroidal and anapole modes
Since the observations of the dynamic toroidal dipole and non-radiating anapole, the field of toroidal electrodynamics has grown rapidly paving the route to novel physical phenomena including new types of optical activity, Aharonov-Bohm effects, invisibility, and Lorentz reciprocity violations with potential applications in spectroscopy, sensing, telecommunications, and light emission. However, despite significant advances in our understanding of toroidal light-matter interactions, the excitation of toroidal and anapole modes in matter is based on heuristic approaches, which typically require complex patterning and/or illumination conditions resulting in narrowband operation and a strong background of unwanted multipole excitations. Detecting anapoles and toroidal dipoles poses an even greater challenge owing to their weak coupling to free-space radiation. Recently, Flying Doughnuts, single-cycle toroidal pulses, have been put forward as ideal probes for toroidal and anapole excitations in matter. In this talk, we will present our recent work on the light-matter interactions of Flying Doughnut pulses with simple dielectric and plasmonic systems, such as particles and films, demonstrating broadband toroidal excitations and discuss strategies for their unambiguous detection.
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Ravi Kumar, Resmi
09044637-e9ab-4c1e-b747-01565983be4b
Zdagkas, Apostolos
af3bc86e-b049-4ea1-b7bb-44e2ee0a4441
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Ravi Kumar, Resmi
09044637-e9ab-4c1e-b747-01565983be4b
Zdagkas, Apostolos
af3bc86e-b049-4ea1-b7bb-44e2ee0a4441
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6

Papasimakis, Nikitas, Ravi Kumar, Resmi, Zdagkas, Apostolos and Zheludev, Nikolai (2021) Excitation and detection of toroidal and anapole modes. ICEAA-IEEE APWC-USNC URSI RSM 2021, Honolulu, Hawaii, United States. 09 - 13 Aug 2021.

Record type: Conference or Workshop Item (Paper)

Abstract

Since the observations of the dynamic toroidal dipole and non-radiating anapole, the field of toroidal electrodynamics has grown rapidly paving the route to novel physical phenomena including new types of optical activity, Aharonov-Bohm effects, invisibility, and Lorentz reciprocity violations with potential applications in spectroscopy, sensing, telecommunications, and light emission. However, despite significant advances in our understanding of toroidal light-matter interactions, the excitation of toroidal and anapole modes in matter is based on heuristic approaches, which typically require complex patterning and/or illumination conditions resulting in narrowband operation and a strong background of unwanted multipole excitations. Detecting anapoles and toroidal dipoles poses an even greater challenge owing to their weak coupling to free-space radiation. Recently, Flying Doughnuts, single-cycle toroidal pulses, have been put forward as ideal probes for toroidal and anapole excitations in matter. In this talk, we will present our recent work on the light-matter interactions of Flying Doughnut pulses with simple dielectric and plasmonic systems, such as particles and films, demonstrating broadband toroidal excitations and discuss strategies for their unambiguous detection.

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Published date: 9 August 2021
Venue - Dates: ICEAA-IEEE APWC-USNC URSI RSM 2021, Honolulu, Hawaii, United States, 2021-08-09 - 2021-08-13

Identifiers

Local EPrints ID: 449062
URI: http://eprints.soton.ac.uk/id/eprint/449062
PURE UUID: df254e5b-a348-4609-96e1-0c82388bf05e
ORCID for Nikitas Papasimakis: ORCID iD orcid.org/0000-0002-6347-6466
ORCID for Apostolos Zdagkas: ORCID iD orcid.org/0000-0002-1734-9722
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

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Date deposited: 14 May 2021 16:31
Last modified: 08 Jun 2021 02:02

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