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      The focusing effect of graded index photonic crystals

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      Author(s)
      Kurt, H.
      Colak, E.
      Cakmak, O.
      Caglayan, H.
      Özbay, Ekmel
      Date
      2008
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Electronic ISSN
      1077-3118
      Publisher
      AIP Publishing LLC
      Volume
      93
      Issue
      17
      Pages
      171108-3 - 171108-1
      Language
      English
      Type
      Article
      Item Usage Stats
      282
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      385
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      Abstract
      We describe an approach to implement graded index (GRIN) structures using two-dimensional photonic crystals (PCs). The lattice spacing along the transverse direction to propagation is altered and we show, both theoretically and experimentally, that such a spatial perturbation is an effective way to obtain GRIN PC. The response of the structure to spatially wide incident beams is investigated and strong focusing behavior is observed. The large spot size conversion ratio can be attainable and is mainly limited by the finite size of the structure. The designed GRIN PC shows promise for use in optical systems that require compact and powerful focusing elements compared to the traditional bulky lenses.
      Permalink
      http://hdl.handle.net/11693/22971
      Published Version (Please cite this version)
      https://doi.org/10.1063/1.3009965
      Collections
      • Department of Electrical and Electronics Engineering 4011
      • Department of Physics 2550
      • Institute of Materials Science and Nanotechnology (UNAM) 2258
      • Nanotechnology Research Center (NANOTAM) 1179
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