Single metalens for generating polarization and phase singularities leading to a reverse flow of energy

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dc.contributor.author Kotlyar, Victor V.
dc.contributor.author Nalimov, Anton G.
dc.contributor.author Stafeev, Sergey S.
dc.contributor.author O'Faolain, Liam
dc.date.accessioned 2019-07-12T11:20:58Z
dc.date.available 2019-07-12T11:20:58Z
dc.date.issued 2019-04-18
dc.identifier.citation Kotlyar, V. V., Nalimov, A. G., Stafeev, S. S. and O’Faolain, L. (2019) ‘Single metalens for generating polarization and phase singularities leading to a reverse flow of energy’, Journal of Optics, 21(5), 055004 (9pp). doi: 10.1088/2040-8986/ab14c8 en
dc.identifier.volume 21 en
dc.identifier.issued 5 en
dc.identifier.startpage 1 en
dc.identifier.endpage 9 en
dc.identifier.issn 2040-8978
dc.identifier.uri http://hdl.handle.net/10468/8152
dc.identifier.doi 10.1088/2040-8986/ab14c8 en
dc.description.abstract Using Jones matrices and vectors, we show that a metasurface-based optical element composed of a set of subwavelength diffraction gratings, whose anisotropic transmittance is described by a matrix of polarization rotation by angle mphiv, where phiv is the polar angle, generate an mth order azimuthally or radially polarized beam, when illuminated by linearly polarized light, or an optical vortex with topological charge m, when illuminated by circularly polarized light. Such a converter performs a spin–orbit transformation, acting similarly to a liquid-crystal half-wave plate. Using the FDTD-aided numerical simulation, we show that uniform linearly or circularly polarized light passing through the above-described optical metasurface with m = 2 and then tightly focused with a binary zone plate generates an on-axis near-focus energy backflow comparable in magnitude with the incident energy. Notably, the magnitude of the reverse energy flow is shown to be the same when focusing a circularly polarized optical vortex with topological charge m = 2 and a light beam with the second-order polarization singularity. en
dc.description.sponsorship Russian Science Foundation (Grant No. 18-19-00595); Российский Фонд Фундаментальных Исследований (РФФИ) (Grant No. 18-29-20003) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher IOP Publishing en
dc.rights © 2019, IOP Publishing Ltd. All rights reserved. en
dc.subject Optical vortex en
dc.subject Polarization singularities en
dc.subject Energy backflow en
dc.subject Metalens en
dc.title Single metalens for generating polarization and phase singularities leading to a reverse flow of energy en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Liam O’Faolain, Tyndall National Institute, University College Cork, Cork, Ireland. T: +353-21-2346830 E: liam.ofaolain@tyndall.ie en
dc.internal.availability Full text available en
dc.check.info Access to this article is restricted until 12 months after publication by request of the publisher. en
dc.check.date 2020-04-18
dc.description.version Accepted Version en
dc.contributor.funder Ministry of Science and Higher Education of the Russian Federation en
dc.contributor.funder Russian Science Foundation en
dc.contributor.funder Российский Фонд Фундаментальных Исследований (РФФИ) en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Optics en
dc.internal.IRISemailaddress liam.ofaolain@tyndall.ie en
dc.identifier.articleid 055004 en
dc.identifier.eissn 2040-8986


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