Electrically switchable metadevices via graphene

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buir.contributor.authorÖzbay, Ekmel
buir.contributor.authorBalcı, Osman
buir.contributor.authorKakenov, Nurbek
buir.contributor.authorKocabaş, Coşkun
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epageeaao1749-9en_US
dc.citation.issueNumber1en_US
dc.citation.spageeaao1749-1en_US
dc.citation.volumeNumber4en_US
dc.contributor.authorBalcı, Osmanen_US
dc.contributor.authorKakenov, Nurbeken_US
dc.contributor.authorKarademir, E.en_US
dc.contributor.authorBalcı, S.en_US
dc.contributor.authorÇakmakyapan, S.en_US
dc.contributor.authorPolat, E. O.en_US
dc.contributor.authorCağlayan, H.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.contributor.authorKocabaş, Coşkunen_US
dc.date.accessioned2019-02-21T16:06:30Z
dc.date.available2019-02-21T16:06:30Z
dc.date.issued2018en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractMetamaterials bring subwavelength resonating structures together to overcome the limitations of conventional materials. The realization of active metadevices has been an outstanding challenge that requires electrically reconfigurable components operating over a broad spectrum with a wide dynamic range. However, the existing capability of metamaterials is not sufficient to realize this goal. By integrating passive metamaterials with active graphene devices, we demonstrate a new class of electrically controlled active metadevices working in microwave frequencies. The fabricated active metadevices enable efficient control of both amplitude (>50 dB) and phase (>90°) of electromagnetic waves. In this hybrid system, graphene operates as a tunable Drude metal that controls the radiation of the passive metamaterials. Furthermore, by integrating individually addressable arrays of metadevices, we demonstrate a new class of spatially varying digital metasurfaces where the local dielectric constant can be reconfigured with applied bias voltages. In addition, we reconfigure resonance frequency of split-ring resonators without changing its amplitude by damping one of the two coupled metasurfaces via graphene. Our approach is general enough to implement various metamaterial systems that could yield new applications ranging from electrically switchable cloaking devices to adaptive camouflage systems. Copyright
dc.description.provenanceMade available in DSpace on 2019-02-21T16:06:30Z (GMT). No. of bitstreams: 1 Bilkent-research-paper.pdf: 222869 bytes, checksum: 842af2b9bd649e7f548593affdbafbb3 (MD5) Previous issue date: 2018en
dc.identifier.doi10.1126/sciadv.aao1749
dc.identifier.issn2375-2548
dc.identifier.urihttp://hdl.handle.net/11693/50315
dc.language.isoEnglish
dc.publisherAmerican Association for the Advancement of Science
dc.relation.isversionofhttps://doi.org/10.1126/sciadv.aao1749
dc.rightsinfo:eu-repo/semantics/openAccess
dc.source.titleScience Advancesen_US
dc.titleElectrically switchable metadevices via grapheneen_US
dc.typeArticleen_US

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