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      Spatial and spatial-frequency filtering using one-dimensional graded-index lattices with defects

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      Author
      Usik, P. V.
      Serebryannikov, A. E.
      Özbay, Ekmel
      Date
      2009
      Source Title
      Optics Communications
      Print ISSN
      0030-4018
      Publisher
      ELSEVIER
      Volume
      282
      Issue
      23
      Pages
      4490 - 4496
      Language
      English
      Type
      Article
      Item Usage Stats
      133
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      106
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      Abstract
      The potential of one-dimensional, periodic, graded-index, isotropic dielectric lattices with defects in multiband spatial and spatial-frequency filtering is studied. It is shown that both narrow- and wide-bandpass filters can be obtained at a proper choice of the number, location, and parameters of the defects placed inside the relatively thin slabs. The peculiarities of achieving multibandness for narrow- and wide-bandpass filters are discussed. Multiband narrow-bandpass filtering is closely related to the transmission features that are associated with Fabry-Pérot resonators with semitransparent planar mirrors. Correspondingly, the observed transmission can be interpreted in terms of the equivalent parameters of such resonators. In particular, it is shown that the resonators filled with an ultralow-index medium can be mimicked, so that defect-mode angle-domain spectrum can be rarefied at large angles of incidence. The obtained results are also expected to be applicable for prediction of the angle-domain behavior of transmission in case of piecewise-homogeneous multilayers.
      Keywords
      Defect mode
      Fabry-Pérot
      Graded-index lattice
      Spatial filtering
      Permalink
      http://hdl.handle.net/11693/22515
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.optcom.2009.08.050
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Nanotechnology Research Center (NANOTAM) 1006
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