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      • Department of Electrical and Electronics Engineering
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      Ultrahigh contrast one-way optical transmission through a subwavelength slit

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      Author
      Battal, E.
      Yogurt, T. A.
      Okyay, Ali Kemal
      Date
      2013
      Source Title
      Plasmonics
      Print ISSN
      1557-1955
      Publisher
      Springer
      Volume
      8
      Issue
      2
      Pages
      509 - 513
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      We computationally demonstrate one-way optical transmission characteristics of a subwavelength slit. We comparatively study the effect in single layer and double layer metallic corrugations. We also investigate the effect of a dielectric spacer layer between double corrugations to control the volumetric coupling of plasmon and optical modes. We computationally show unidirectional transmission behavior with an ultrahigh contrast ratio of 53.4 dB at λ = 1.56 μm. Volumetric coupling efficiency through the nanoslit strongly depends on the efficient excitation of both the surface plasmon resonance and metal–insulator–metal waveguide modes. We show that the behavior is tunable in a wide spectral range.
      Keywords
      All-optical devices
      Coupled resonators
      Gratings
      Surface plasmons
      Waveguides
      Permalink
      http://hdl.handle.net/11693/20943
      Published Version (Please cite this version)
      http://dx.doi.org/10.1007/s11468-012-9419-4
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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