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      Experimental validation of strong directional selectivity in nonsymmetric metallic gratings with a subwavelength slit

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      Author
      Cakmakyapan, S.
      Caglayan, H.
      Serebryannikov, A. E.
      Özbay, Ekmel
      Date
      2011-02-02
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Publisher
      American Institute of Physics
      Volume
      98
      Issue
      5
      Pages
      051103-1 - 051103-3
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Strong directional selectivity is theoretically predicted and experimentally validated at the microwave frequencies in the beaming regime for a single subwavelength slit in nonsymmetric metallic gratings with double-side corrugations. The operation regime can be realized at a fixed angle of incidence when the surface-plasmon assisted transmission is significant within a narrow range of observation angles, if illuminating one of the grating interfaces, and tends to vanish for all observation angles, if illuminating the opposite interface. The studied effect is connected with asymmetry (nonreciprocity) in the beaming that occurs if the surface plasmon properties are substantially different for the two interfaces being well isolated from each other.
      Keywords
      Directional selectivity
      Experimental validations
      Fixed angles
      Metallic gratings
      Nonreciprocity
      Nonsymmetric
      Observation angle
      Operation regime
      Subwavelength slits
      Surface plasmons
      Surface-plasmon
      Diffraction gratings
      Plasmons
      Permalink
      http://hdl.handle.net/11693/22045
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.3552675
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Nanotechnology Research Center (NANOTAM) 1006
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