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      Labyrinth based left-handed metamaterials and sub-wavelength focusing of electromagnetic waves

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      Author
      Özbay, Ekmel
      Bulu, İrfan
      Çağlayan, Hümeyra
      Date
      2006
      Source Title
      Proceedings of SPIE Vol. 6128, Photonic Crystal Materials and Devices IV
      Print ISSN
      0277-786X
      Publisher
      SPIE
      Volume
      6128
      Pages
      814 - 816
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      We propose and demonstrate a resonant structure that solves two major problems related to the split-ring resonator structure. These major problems may be stated as the bianisotropy and electric coupling to the magnetic resonance. These two problems introduce difficulties in obtaining isotropic left-handed metamaterial mediums. The resonant structure that we propose here solves both of these problems. We further show that in addition to the magnetic resonance, when combined with a suitable wire medium, the structure that we propose exhibits left-handed transmission band. We further demonstrate the sub-wavelength focusing of electromagnetic waves by use of a two dimensional labyrinth based metamaterial. Our experimental results showed that it is possible to focus the source field with half widths as small as λ/4 by using the labyrinth based metamaterial.
      Keywords
      Left-handed medium
      Magnetic resonance
      Metamaterial
      Split-ring resonator
      Sub-wavelength focusing
      Anisotropy
      Electromagnetic waves
      Permalink
      http://hdl.handle.net/11693/27239
      Published Version (Please cite this version)
      http://dx.doi.org/10.1117/12.649548
      Collections
      • Department of Physics 2299
      • Nanotechnology Research Center (NANOTAM) 1006
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