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dc.contributor.authorRuiz De Galarreta, C
dc.contributor.authorAlexeev, A
dc.contributor.authorBertolotti, J
dc.contributor.authorLopez-Garcia, M
dc.contributor.authorKlemm, M
dc.contributor.authorCryan, MJ
dc.contributor.authorAu, Y-Y
dc.contributor.authorWright, CD
dc.date.accessioned2018-01-26T15:21:06Z
dc.date.issued2018-01-05
dc.description.abstractThe development of flat, compact beam-steering devices with no bulky moving parts is opening up a new route to a variety of exciting applications, such as LIDAR scanning systems for autonomous vehicles, robotics and sensing, free-space, and even surface wave optical signal coupling. In this paper, the design, fabrication and characterization of innovative, nonvolatile, and reconfigurable beam-steering metadevices enabled by a combination of optical metasurfaces and chalcogenide phase-change materials is reported. The metadevices reflect an incident optical beam in a mirror-like fashion when the phase-change layer is in the crystalline state, but reflect anomalously at predesigned angles when the phase-change layer is switched into its amorphous state. Experimental angle-resolved spectrometry measurements verify that fabricated devices perform as designed, with high efficiencies, up to 40%, when operating at 1550 nm. Laser-induced crystallization and reamorphization experiments confirm reversible switching of the device. It is believed that reconfigurable phase-change-based beam-steering and beam-shaping metadevices, such as those reported here, can offer real applications advantages, such as high efficiency, compactness, fast switching times and, due to the nonvolatile nature of chalcogenide phase-change materials, low power consumption.en_GB
dc.description.sponsorshipC.D.W. acknowledges funding via the US Naval Research LaboratoriesONRG programme (#N62909-16-1-2174) and the EPSRC ChAMP and WAFT grants (EP/M015130/1 and EP/M015173/1). C.R.d.G. acknowledges funding via the EPSRC CDT in Metamaterials (EP/L015331/1). M.L.G. acknowledges funding via the EPSRC grant EP/M009033/1.en_GB
dc.identifier.citationPublished online 5 January 2018en_GB
dc.identifier.doi10.1002/adfm.201704993
dc.identifier.urihttp://hdl.handle.net/10871/31201
dc.language.isoenen_GB
dc.publisherWileyen_GB
dc.rights© 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en_GB
dc.subjectBeam steeringen_GB
dc.subjectphased arraysen_GB
dc.subjectphase-change materialsen_GB
dc.subjectplasmonic metasurfacesen_GB
dc.subjectreflectarraysen_GB
dc.subjectphotonic metadevicesen_GB
dc.titleNonvolatile Reconfigurable Phase-Change Metadevices for Beam Steering in the Near Infrareden_GB
dc.typeArticleen_GB
dc.identifier.issn1616-301X
dc.relation.isreplacedby10871/32006
dc.relation.isreplacedbyhttp://hdl.handle.net/10871/32006
dc.descriptionThis is the author accepted manuscript. The final version is available from Wiley via the DOI in this recorden_GB
dc.identifier.journalAdvanced Functional Materialsen_GB
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/


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© 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's licence is described as © 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.