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      Observation of off-axis directional beaming via subwavelength asymmetric metallic gratings

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      Author
      Caglayan, H.
      Bulu, I.
      Özbay, Ekmel
      Date
      2009
      Source Title
      Journal of Physics D: Applied Physics
      Print ISSN
      0022-3727
      Electronic ISSN
      1361-6463
      Publisher
      Institute of Physics Publishing Ltd.
      Volume
      42
      Issue
      4
      Pages
      045105 (1-5)
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      It is possible to obtain enhanced and directional beams using subwavelength metallic structures. However, the enhanced beams throughout such structures are only directed towards the propagation direction. In this study, we design the output surface gratings asymmetrically in order to steer the beaming angle. We use a metallic structure with a subwavelength slit (λ/10) and grating periods of 14 mm and 22 mm on different sides of the output surface. We demonstrate off-axis directional beaming in the microwave regime with an FWHM of 10° with a beaming angle of 15°. The beaming angle can be changed by arranging the grating periods of the output surface of the metallic structure.
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      http://hdl.handle.net/11693/22694
      Published Version (Please cite this version)
      http://doi.org/10.1088/0022-3727/42/4/045105
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
      • Nanotechnology Research Center (NANOTAM) 1006
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