Theory, observation, and ultrafast response of the hybrid anapole regime in light scattering

Canós Valero, A, Gurvitz, EA, Benimetskiy, FA, Pidgayko, DA, Samusev, A, Evlyukhin, AB, Bobrovs, V, Redka, D, Tribelsky, MI, Rahmani, M ORCID: https://orcid.org/0000-0001-9268-4793, Kamali, KZ, Pavlov, AA, Miroshnichenko, AE and Shalin, AS, 2021. Theory, observation, and ultrafast response of the hybrid anapole regime in light scattering. Laser andamp; Photonics Reviews, 15 (10): 2100114. ISSN 1863-8880

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Abstract

Modern nanophotonics has witnessed the rise of "electric anapoles" (EDAs), destructive interferences of electric and toroidal electric dipoles, actively exploited to resonantly decrease radiation from nanoresonators. However, the inherent duality in Maxwell equations suggests the intriguing possibility of "magnetic anapoles," involving a nonradiating composition of a magnetic dipole and a magnetic toroidal dipole. Here, a hybrid anapole (HA) of mixed electric and magnetic character is predicted and observed experimentally via dark field spectroscopy, with all the dominant multipoles being suppressed by the toroidal terms in a nanocylinder. Breaking the spherical symmetry allows to overlap up to four anapoles stemming from different multipoles with just two tuning parameters. This effect is due to a symmetry-allowed connection between the resonator multipolar response and its eigenstates. The authors delve into the physics of such current configurations in the stationary and transient regimes and explore new ultrafast phenomena arising at sub-picosecond timescales, associated with the HA dynamics. The theoretical results allow the design of non-Huygens metasurfaces featuring a dual functionality: perfect transparency in the stationary regime and controllable ultrashort pulse beatings in the transient. Besides offering significant advantages with respect to EDAs, HAs can play an essential role in developing the emerging field of ultrafast resonant phenomena.

Item Type:	Journal article
Publication Title:	Laser andamp; Photonics Reviews
Creators:	Canós Valero, A., Gurvitz, E.A., Benimetskiy, F.A., Pidgayko, D.A., Samusev, A., Evlyukhin, A.B., Bobrovs, V., Redka, D., Tribelsky, M.I., Rahmani, M., Kamali, K.Z., Pavlov, A.A., Miroshnichenko, A.E. and Shalin, A.S.
Publisher:	Wiley
Date:	18 October 2021
Volume:	15
Number:	10
ISSN:	1863-8880
Identifiers:	Number Type 10.1002/lpor.202100114 DOI 1561480 Other
Rights:	Copyright © 2021 John Wiley & Sons, Inc. All rights reserved. This is the peer reviewed version of the following article: Adrià Canós Valero,Egor A. Gurvitz,Fedor A. Benimetskiy,Dmitry A. Pidgayko,Anton Samusev,Andrey B. Evlyukhin,Vjaceslavs Bobrovs,Dmitrii Redka,Michael I. Tribelsky,Mohsen Rahmani,Khosro Zangeneh Kamali,Alexander A. Pavlov,Andrey E. Miroshnichenko,Alexander S. Shalin (2021). Theory, observation, and ultrafast response of the hybrid anapole regime in light scattering. Laser and Photonics Reviews, 15(10), Article 2100114, which has been published in final form at https://doi.org/10.1002/lpor.202100114 .This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley's version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
Divisions:	Schools > School of Science and Technology
Record created by:	Linda Sullivan
Date Added:	04 Jul 2022 14:00
Last Modified:	02 Aug 2022 03:00
URI:	https://irep.ntu.ac.uk/id/eprint/46558

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