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      Three-dimensional study of planar optical antennas made of split-ring architecture outperforming dipole antennas for increased field localization

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      Author
      Kilic, V. T.
      Erturk, V. B.
      Demir, Hilmi Volkan
      Date
      2012-01-09
      Source Title
      Optics Letters
      Print ISSN
      0146-9592
      Publisher
      Optical Society of America
      Volume
      37
      Issue
      2
      Pages
      139 - 141
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      Optical antennas are of fundamental importance for the strongly localizing field beyond the diffraction limit. We report that planar optical antennas made of split-ring architecture are numerically found in three-dimensional simulations to outperform dipole antennas for the enhancement of localized field intensity inside their gap regions. The computational results (finite-difference time-domain) indicate that the resulting field localization, which is of the order of many thousandfold, in the case of the split-ring resonators is at least 2 times stronger than the one in the dipole antennas resonant at the same operating wavelength, while the two antenna types feature the same gap size and tip sharpness.
      Keywords
      Electric-field
      Nanoantennas
      Enhancement
      Resonance
      Permalink
      http://hdl.handle.net/11693/11900
      Published Version (Please cite this version)
      http://dx.doi.org/10.1364/OL.37.000139
      Collections
      • Department of Electrical and Electronics Engineering 3597
      • Department of Physics 2329
      • Institute of Materials Science and Nanotechnology (UNAM) 1831
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