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      Coupling enhancement of split ring resonators on graphene

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      Author(s)
      Cakmakyapan, S.
      Caglayan, H.
      Özbay, Ekmel
      Date
      2014-12
      Source Title
      Carbon
      Print ISSN
      0008-6223
      Publisher
      Pergamon Press
      Volume
      80
      Pages
      351 - 355
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Metallic split ring resonator (SRR) structures are used in nanophotonics applications in order to localize and enhance incident electromagnetic field. Electrically controllable sheet carrier concentration of graphene provides a platform where the resonance of the SRRs fabricated on graphene can be tuned. The reflectivity spectra of SRR arrays shift by applying gate voltage, which modulates the sheet carrier concentration, and thereby the optical conductivity of monolayer graphene. We experimentally and numerically demonstrated that the tuning range can be increased by tailoring the effective mode area of the SRR and enhancing the interaction with graphene. The tuning capability is one of the important features of graphene based tunable sensors, optical switches, and modulator applications. © 2014 Elsevier Ltd. All rights reserved.
      Keywords
      Carrier concentration
      Electromagnetic fields
      Graphene
      Optical conductivity
      Optical resonators
      Optical switches
      Resonators
      Tuning effective mode areas
      Important features
      Reflectivity spectra
      Sheet carrier concentration
      Split ring resonator
      Tunable sensors
      Tuning capability
      Permalink
      http://hdl.handle.net/11693/12451
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.carbon.2014.08.073
      Collections
      • Department of Electrical and Electronics Engineering 3702
      • Department of Physics 2397
      • Nanotechnology Research Center (NANOTAM) 1063
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