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      Nanoplasmonic surfaces enabling strong surfacenormal electric field enhancement

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      Author
      Güngör, K.
      Ünal, E.
      Demir, H. V.
      Date
      2013
      Journal Title
      Optics Express
      Print ISSN
      10944087
      Publisher
      Optical Society of American (OSA)
      Volume
      21
      Issue
      20
      Pages
      23097 - 23106
      Language
      English
      Type
      Article
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      Please cite this item using this persistent URL
      http://hdl.handle.net/11693/20768
      Abstract
      Conventional two-dimensional (2D) plasmonic arrays provide electric field intensity enhancement in the plane, typically with a surface coverage around 50% in the plan-view. Here, we show nanoplasmonic three-dimensional (3D) surfaces with 100% surface coverage enabling strong surface-normal field enhancement. Experimental measurements are found to agree well with the full electromagnetic solution. Along with the surface-normal localization when using the plasmonic 3D-surface, observed maximum field enhancement is 7.2-fold stronger in the 3D-surface than that of the 2D counterpart structure. 3D-plasmonic nonplanar surfaces provide the ability to generate volumetric field enhancement, possibly useful for enhanced plasmonic coupling and interactions. © 2013 Optical Society of America.
      Published as
      http://dx.doi.org/10.1364/OE.21.023097
      Collections
      • Department of Electrical and Electronics Engineering 2973
      • Institute of Materials Science and Nanotechnology 1393

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