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      Enhanced transmission of microwave radiation in one-dimensional metallic gratings with subwavelength aperture

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      Author(s)
      Akarca-Biyikli, S. S.
      Bulu, I.
      Özbay, Ekmel
      Date
      2004
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Publisher
      American Institute of Physics
      Volume
      85
      Issue
      7
      Pages
      1098 - 1100
      Language
      English
      Type
      Article
      Item Usage Stats
      216
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      244
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      Abstract
      We report a theoretical and experimental demonstration of enhanced microwave transmission through subwavelength apertures in metallic structures with double-sided gratings. Three different types of aluminum gratings (sinusoidal, symmetric rectangular, and asymmetric rectangular shaped) are designed and analyzed. Our samples have a periodicity of 16 mm, and a slit width of 2 mm. Transmission measurements are taken in the 10–37.5 GHz frequency spectrum, which corresponds to 8–30 mm wavelength region. All three structures display significantly enhanced transmission around surface plasmon resonance frequencies. The experimental results agree well with finite-difference-time-domain based theoretical simulations. Asymmetric rectangular grating structure exhibits the best results with ,50% transmission at 20.7 mm, enhancement factor of ,25, and ±4° angular divergence.
      Keywords
      Metallic gratings
      Metallic structures
      Subwavelength apertures
      Wave vectors
      Aluminum
      Computer simulation
      Electric fields
      Electric network analyzers
      Electromagnetic wave transmission
      Electromagnetic waves
      Finite difference method
      Natural frequencies
      Photons
      Resonance
      Surface plasmon resonance
      Time domain analysis
      Microwaves
      Permalink
      http://hdl.handle.net/11693/24240
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.1783013
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      • Department of Physics 2550
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