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

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dc.check.date2020-04-18
dc.check.infoAccess to this article is restricted until 12 months after publication by request of the publisher.en
dc.contributor.authorKotlyar, Victor V.
dc.contributor.authorNalimov, Anton G.
dc.contributor.authorStafeev, Sergey S.
dc.contributor.authorO'Faolain, Liam
dc.contributor.funderMinistry of Science and Higher Education of the Russian Federationen
dc.contributor.funderRussian Science Foundationen
dc.contributor.funderРоссийский Фонд Фундаментальных Исследований (РФФИ)en
dc.date.accessioned2019-07-12T11:20:58Z
dc.date.available2019-07-12T11:20:58Z
dc.date.issued2019-04-18
dc.description.abstractUsing 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.sponsorshipRussian Science Foundation (Grant No. 18-19-00595); Российский Фонд Фундаментальных Исследований (РФФИ) (Grant No. 18-29-20003)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid055004en
dc.identifier.citationKotlyar, 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/ab14c8en
dc.identifier.doi10.1088/2040-8986/ab14c8en
dc.identifier.eissn2040-8986
dc.identifier.endpage9en
dc.identifier.issn2040-8978
dc.identifier.issued5en
dc.identifier.journaltitleJournal of Opticsen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/8152
dc.identifier.volume21en
dc.language.isoenen
dc.publisherIOP Publishingen
dc.rights© 2019, IOP Publishing Ltd. All rights reserved.en
dc.subjectOptical vortexen
dc.subjectPolarization singularitiesen
dc.subjectEnergy backflowen
dc.subjectMetalensen
dc.titleSingle metalens for generating polarization and phase singularities leading to a reverse flow of energyen
dc.typeArticle (peer-reviewed)en
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