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      The almost magical world of metamaterials

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      Author
      Özbay, Ekmel
      Date
      2008-11
      Source Title
      Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
      Print ISSN
      1092-8081
      Publisher
      IEEE
      Pages
      73 - 74
      Language
      English
      Type
      Conference Paper
      Item Usage Stats
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      Abstract
      In recent years, there has been a burgeoning interest in rapidly growing field of metamaterials due to their unprecedented properties unattainable from ordinary materials. Veselago pointed out that a material exhibiting negative values of dielectric permittivity (epsiv) and magnetic permeability (mu) would have a negative refractive index [1]. Generally speaking, the dielectric permittivity (epsiv) and the magnetic permeability (mu) are both positive for natural materials. In fact, it is possible to obtain negative values for epsiv and mu by utilizing proper designs of metamaterials. Left-handed electromagnetism and negative refraction are achievable with artificially structured metamaterials exhibiting negative values of permittivity and permeability simultaneously at a certain frequency region. The first steps to realize these novel type of materials were taken by Smith et al., where they were able to observe a left-handed propagation band at frequencies where both dielectric permittivity and magnetic permeability of the composite metamaterial are negative [2]. Soon after, left-handed metamaterials with an effective negative index of refraction are successfully demonstrated by various groups.
      Keywords
      Metamaterials
      Magnetic materials
      Dielectric materials
      Permittivity
      Permeability
      Frequency
      Refractive index
      Electromagnetic refraction
      Composite materials
      Electromagnetic propagation
      Permalink
      http://hdl.handle.net/11693/26774
      Published Version (Please cite this version)
      http://dx.doi.org/10.1109/LEOS.2008.4688494
      Collections
      • Department of Electrical and Electronics Engineering 3524
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
      • Nanotechnology Research Center (NANOTAM) 1006
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