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      Unidirectional transmission in non-symmetric gratings containing metallic layers

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      Author
      Serebryannikov, A.E.
      Özbay, Ekmel
      Date
      2009
      Source Title
      Optics Express
      Print ISSN
      10944087
      Publisher
      Optical Society of American (OSA)
      Volume
      17
      Issue
      16
      Pages
      13335 - 13345
      Language
      English
      Type
      Article
      Item Usage Stats
      133
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      100
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      Abstract
      The mechanism of achieving unidirectional transmission in the gratings, which only contain isotropic dielectric and metallic layers, is suggested and numerically validated. It is shown that significant transmission in one direction and nearly zero transmission in the opposite direction can be obtained in the same intrinsically isotropic gratings as those studied recently in A. E. Serebryannikov and E. Ozbay, Opt. Express 17, 278 (2009), but at a non-zero angle of incidence. The tilting, non-symmetric features of the grating and the presence of a metallic layer with a small positive real part of the index of refraction are the conditions that are necessary for obtaining the unidirectionality. Single- and multibeam operational regimes are demonstrated. The frequency and angle ranges of the unidirectional transmission can be estimated by using the conventional framework based on isofrequency dispersion contours and construction lines that properly take into account the periodic features of the interfaces, but should then be corrected because of the tunneling arising within the adjacent ranges. After proper optimization, this mechanism is expected to become an alternative to that based on the use of anisotropic materials. © 2009 Optical Society of America.
      Keywords
      Refractive index
      Anisotropic material
      Index of refraction
      Isotropic gratings
      Metallic layers
      Multi-beam
      Positive real
      Unidirectionality
      Zero angle
      Light transmission
      metal
      article
      computer aided design
      computer simulation
      equipment
      equipment design
      instrumentation
      light
      optical instrumentation
      radiation scattering
      refractometry
      theoretical model
      Computer Simulation
      Computer-Aided Design
      Equipment Design
      Equipment Failure Analysis
      Light
      Metals
      Models, Theoretical
      Optical Devices
      Refractometry
      Scattering, Radiation
      Permalink
      http://hdl.handle.net/11693/22664
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OE.17.013335
      Collections
      • Department of Electrical and Electronics Engineering 3613
      • Department of Physics 2345
      • Nanotechnology Research Center (NANOTAM) 1038
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