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      Near-field light localization using subwavelength apertures incorporated with metamaterials

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      Author(s)
      Ates, D.
      Cakmak, A. O.
      Özbay, Ekmel
      Date
      2012-03-12
      Source Title
      Optics Communications
      Print ISSN
      0030-4018
      Publisher
      Elsevier
      Volume
      285
      Issue
      16
      Pages
      3390 - 3396
      Language
      English
      Type
      Article
      Item Usage Stats
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      101
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      Abstract
      We report strong near-field electromagnetic localization by using subwavelength apertures and metamaterials that operate at microwave frequencies. We designed split ring resonators with distinct configurations in order to obtain extraordinary transmission results. Furthermore, we analyzed the field localization and focusing characteristics of the transmitted evanescent waves. The employed metamaterial configurations yielded an improvement on the transmission efficiency on the order of 27 dB and 50 dB for the deep subwavelength apertures. The metamaterial loaded apertures are considered as a total system that offered spot size conversion ratios as high as 7.12 and 9.11 for the corresponding metamaterial configurations. The proposed system is shown to intensify the electric fields of the source located in the near-field. It also narrows down the electromagnetic waves such that a full width at half maximum value of λ/29 is obtained.
      Keywords
      Diffraction, grating and apertures
      Electromagnetic wave transmission
      Metamaterials
      Resonators
      Conversion ratio
      Electromagnetic localization
      Evanescent wave
      Extraordinary transmission
      Field localization
      Light localization
      Near-field
      Split ring resonator
      Spot sizes
      Subwavelength apertures
      Transmission efficiency
      Electric fields
      Electromagnetic wave transmission
      Electromagnetic waves
      Resonators
      Metamaterials
      Permalink
      http://hdl.handle.net/11693/21397
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.optcom.2012.02.102
      Collections
      • Department of Electrical and Electronics Engineering 3702
      • Department of Physics 2397
      • Nanotechnology Research Center (NANOTAM) 1063
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