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Nonradiating anapole modes in dielectric nanoparticles

Evlyukhin, Andrey B.; Yu, Ye Feng; Bakker, Reuben M.; Chipouline, Arkadi; Kuznetsov, Arseniy I.; Luk’yanchuk, Boris; Chichkov, Boris N.; Miroshnichenko, Andrey; Kivshar, Yuri

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Nonradiating current configurations attract attention of physicists for many years as possible models of stable atoms. One intriguing example of such a nonradiating source is known as 'anapole'. An anapole mode can be viewed as a composition of electric and toroidal dipole moments, resulting in destructive interference of the radiation fields due to similarity of their far-field scattering patterns. Here we demonstrate experimentally that dielectric nanoparticles can exhibit a radiationless...[Show more]

dc.contributor.authorEvlyukhin, Andrey B.
dc.contributor.authorYu, Ye Feng
dc.contributor.authorBakker, Reuben M.
dc.contributor.authorChipouline, Arkadi
dc.contributor.authorKuznetsov, Arseniy I.
dc.contributor.authorLuk’yanchuk, Boris
dc.contributor.authorChichkov, Boris N.
dc.contributor.authorMiroshnichenko, Andrey
dc.contributor.authorKivshar, Yuri
dc.date.accessioned2015-08-31T02:07:12Z
dc.date.available2015-08-31T02:07:12Z
dc.identifier.issn2041-1723
dc.identifier.urihttp://hdl.handle.net/1885/15019
dc.description.abstractNonradiating current configurations attract attention of physicists for many years as possible models of stable atoms. One intriguing example of such a nonradiating source is known as 'anapole'. An anapole mode can be viewed as a composition of electric and toroidal dipole moments, resulting in destructive interference of the radiation fields due to similarity of their far-field scattering patterns. Here we demonstrate experimentally that dielectric nanoparticles can exhibit a radiationless anapole mode in visible. We achieve the spectral overlap of the toroidal and electric dipole modes through a geometry tuning, and observe a highly pronounced dip in the far-field scattering accompanied by the specific near-field distribution associated with the anapole mode. The anapole physics provides a unique playground for the study of electromagnetic properties of nontrivial excitations of complex fields, reciprocity violation and Aharonov-Bohm like phenomena at optical frequencies.
dc.description.sponsorshipThe work of A.E.M. was supported by the Australian Research Council via Future Fellowship program (FT110100037). The authors at DSI were supported by DSI core funds. Fabrication, Scanning Electron Microscope Imaging and NSOM works were carried out in facilities provided by SnFPC@DSI (SERC Grant 092 160 0139). Zhen Ying Pan (DSI) is acknowledged for SEM imaging. Yi Zhou (DSI) is acknowledged for silicon film growth. Leonard Gonzaga (DSI), Yeow Teck Toh (DSI) and Doris Ng (DSI) are acknowledged for development of the silicon nanofabrication procedure. B.N.C. acknowledges support from the Government of Russian Federation, Megagrant No. 14.B25.31.0019.
dc.publisherNature Publishing Group
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
dc.sourceNature Communications
dc.titleNonradiating anapole modes in dielectric nanoparticles
dc.typeJournal article
local.identifier.citationvolume6
dc.date.issued2015-08-27
local.identifier.absfor020300 - CLASSICAL PHYSICS
local.identifier.absfor020500 - OPTICAL PHYSICS
local.identifier.ariespublicationU3488905xPUB5751
local.type.statusPublished Version
local.contributor.affiliationMiroshnichenko, Andrey E., Nonlinear Physics Centre, The Australian National University
local.contributor.affiliationKivshar, Yuri, Nonlinear Physics Centre, The Australian National University
dc.relationhttp://purl.org/au-research/grants/arc/FT110100037
local.identifier.essn2041-1723
local.bibliographicCitation.issue8069
local.bibliographicCitation.startpage8069
local.bibliographicCitation.lastpage8
local.identifier.doi10.1038/ncomms9069
dc.date.updated2016-02-24T10:08:43Z
local.identifier.scopusID2-s2.0-84940524677
CollectionsANU Research Publications

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