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      Plasmonic structures with highly directional beaming properties

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      Author(s)
      Çağlayan, Hümeyra
      Bulu, İrfan
      Özbay, Ekmel
      Date
      2006
      Source Title
      Journal of Physics: Conference Series
      Print ISSN
      1742-6588
      Publisher
      IOP
      Volume
      36
      Pages
      41 - 45
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      We studied the diffraction of electromagnetic waves from subwavelength metallic circular apertures in the microwave spectrum. The metallic samples had a subwavelength hole with a diameter of 8 mm and had concentric grooves with a periodicity of 16 mm. We present the angular transmission distributions from circular annular apertures, and circular annular apertures surrounded by concentric periodic grooves. At the surface mode resonance frequency the transmitted electromagnetic waves from the subwavelength circular annular aperture surrounded by concentric periodic grooves have a strong angular confinement with an angular divergence of 3°. This represents a fourfold reduction when compared to the angular divergence of the beam transmitted from the subwavelength circular aperture.
      Keywords
      Plasmonic structures
      Electromagnetic waves
      EM waves
      Permalink
      http://hdl.handle.net/11693/27249
      Published Version (Please cite this version)
      http://dx.doi.org/10.1088/1742-6596/36/1/008
      Collections
      • Department of Physics 2397
      • Nanotechnology Research Center (NANOTAM) 1063
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