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      Multichannel optical diode with unidirectional diffraction relevant total transmission

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      Author
      Serebryannikov, A.E.
      Cakmak, A.O.
      Özbay, Ekmel
      Date
      2012
      Source Title
      Optics Express
      Print ISSN
      10944087
      Publisher
      Optical Society of American (OSA)
      Volume
      20
      Issue
      14
      Pages
      14980 - 14990
      Language
      English
      Type
      Article
      Item Usage Stats
      132
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      105
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      Abstract
      We will show that broadband unidirectional optical transmission with a total transmission maximum inside the band can be obtained for linearly polarized incident waves in the nonsymmetric photonic crystal gratings made of isotropic linear materials at a fixed nonzero or zero angle of incidence. Being based on the merging of diffraction and dispersion effects, the basic physical mechanism studied exploits the transmission channels associated with higher orders, for which asymmetry in the coupling conditions at the two grating interfaces appears when spatial inversion symmetry is broken. Total transmission in one direction and zero transmission in the opposite direction can be obtained due to hybridization of Fabry-Perot type resonances with a diffraction anomaly that yields a diode-like operation regime. Single-beam deflection and two-beam splitting can be obtained, for which transmission can be (nearly) total, if the corrugated side is illuminated. In contrast to the previous studies, it is also shown that unidirectional transmission can appear only at a fixed frequency and only due to diffractions, when total transmission occurs at the noncorrugated-side illumination, being in agreement with the Lorentz Lemma. © 2012 Optical Society of America.
      Keywords
      Diffraction
      Coupling condition
      Dispersion effect
      Fabry-Perot
      Fixed frequency
      Linear materials
      Linearly polarized
      Lorentz lemma
      Multi-channel
      Nonsymmetric
      Operation regime
      Optical diodes
      Physical mechanism
      Single-beam
      Spatial inversion symmetry
      Total transmission
      Transmission channels
      Two beams
      Zero angle
      Diffraction gratings
      Permalink
      http://hdl.handle.net/11693/21401
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OE.20.014980
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Nanotechnology Research Center (NANOTAM) 1006
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