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      Extraordinary grating-coupled microwave transmission through a subwavelength annular aperture

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      Author
      Caglayan, H.
      Bulu, I.
      Özbay, Ekmel
      Date
      2005-03-07
      Source Title
      Optics Express
      Print ISSN
      1094-4087
      Publisher
      Optical Society of America
      Volume
      13
      Issue
      5
      Pages
      1666 - 1671
      Language
      English
      Type
      Article
      Item Usage Stats
      140
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      114
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      Abstract
      We studied coupling phenomena between surface plasmons and electromagnetic waves in the microwave spectrum using circular apertures surrounded by array of grooves. We first present experimental and theoretical results of enhanced microwave transmission though a subwavelength circular aperture with concentric periodic grooves around the surface plasmon resonance frequency. This is followed by transmission studies through circular annular apertures and circular annular apertures surrounded by concentric periodic grooves. We demonstrated that 145 fold enhancement factor could be obtained with a subwavelength circular annular aperture surrounded by concentric periodic grooves. Our results show that, high transmission from a circular annular aperture with grooves is assisted by the guided mode of the coaxial waveguide and coupling to the surface plasmons. (C) 2005 Optical Society of America.
      Keywords
      Enhanced Light Transmission
      Optical-transmission
      Metallic Gratings
      Hole Arrays
      Surface-plasmons,radiation
      Films
      Permalink
      http://hdl.handle.net/11693/11393
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OPEX.13.001666
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
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