Comparison of back and top gating schemes with tunable graphene fractal metasurfaces

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buir.contributor.authorÖzbay, Ekmel
buir.contributor.orcidÖzbay, Ekmel|0000-0003-2953-1828
dc.citation.epage2307en_US
dc.citation.issueNumber12en_US
dc.citation.spage2303en_US
dc.citation.volumeNumber3en_US
dc.contributor.authorAygar, A. M.en_US
dc.contributor.authorBalci, O.en_US
dc.contributor.authorCakmakyapan, S.en_US
dc.contributor.authorKocabas, C.en_US
dc.contributor.authorCaglayan, H.en_US
dc.contributor.authorÖzbay, Ekmelen_US
dc.date.accessioned2018-04-12T10:50:32Z
dc.date.available2018-04-12T10:50:32Z
dc.date.issued2016en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractIn this work, fractal metasurfaces that consist of periodic gold squares on graphene are used to increase light-graphene interaction. We show by simulations and experiments that higher level fractal structures result in higher spectral tunability of resonance wavelength. This is explained by higher field localization for higher level fractal structures. Furthermore, spectral tunability of fractal metasurfaces integrated with graphene is investigated comparing two different schemes for electrostatic gating. Experiment results show that a top-gated device yields more spectral tunability (8% of resonance wavelength) while requiring much smaller gate voltages compared to the back-gated device. © 2016 American Chemical Society.en_US
dc.identifier.doi10.1021/acsphotonics.6b00440en_US
dc.identifier.issn2330-4022
dc.identifier.urihttp://hdl.handle.net/11693/36716
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/acsphotonics.6b00440en_US
dc.source.titleACS Photonicsen_US
dc.subjectFractal metasurfacesen_US
dc.subjectGrapheneen_US
dc.subjectPlasmonicsen_US
dc.subjectSpectral tunabilityen_US
dc.titleComparison of back and top gating schemes with tunable graphene fractal metasurfacesen_US
dc.typeArticleen_US

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Department of Electrical and Electronics Engineering
Department of Physics
Nanotechnology Research Center (NANOTAM)