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      Negative refraction and imaging beyond the diffraction limit by a two-dimensional left-handed metamaterial

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      Author(s)
      Özbay, Ekmel
      Aydin, K.
      Date
      2008
      Source Title
      Photonics and Nanostructures - Fundamentals and Applications
      Print ISSN
      1569-4410
      Electronic ISSN
      1569-4429
      Publisher
      Elsevier BV
      Volume
      6
      Issue
      1
      Pages
      108 - 115
      Language
      English
      Type
      Article
      Item Usage Stats
      146
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      Abstract
      We report our experimental results on two-dimensional left-handed metamaterials (LHM) exhibiting negative refraction and subwavelength imaging. Transmission and reflection spectra of LHM are studied and a left-handed transmission band is observed at the frequencies where both dielectric permittivity and magnetic permeability are negative. Impedance matching is verified both with the experiments and simulations. The two-dimensional LHM structure is verified to have a negative refractive index. We employed three different methods to observe negative refraction; refraction through prism-shaped LHM, beam shifting method, and phase shift experiments. We further demonstrated subwavelength imaging and resolution using LHM superlenses. The effect of thickness on the resolving power is investigated experimentally.
      Keywords
      Metamaterial
      Left-handed material
      Negative refraction
      Subwavelength imaging
      Superlens
      Permalink
      http://hdl.handle.net/11693/23145
      Published Version (Please cite this version)
      http://doi.org/10.1016/j.photonics.2007.09.003
      Collections
      • Department of Electrical and Electronics Engineering 3702
      • Department of Physics 2397
      • Institute of Materials Science and Nanotechnology (UNAM) 1930
      • Nanotechnology Research Center (NANOTAM) 1063
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