Local capacitor model for plasmonic electric field enhancement

J. H. Kang, D. S. Kim, Q Han Park

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Abstract

We present a local capacitor model that enables a simple yet quantitatively accurate description of lightning rod effect in nanoplasmonics. A notion of λ-zone capacitance is proposed and applied to predict the strongly induced electric field by a light source near nanoscale metal edges such as metal tip or metal gap. The enhancement factor, calculated from the local capacitor model, shows excellent agreement with more rigorous results. The λ-zone capacitor allows a blockwise treatment of nano-optical devices and constitutes a basic element of optical nanocircuits.

Original languageEnglish
Article number093906
JournalPhysical Review Letters
Volume102
Issue number9
DOIs
Publication statusPublished - 2009 Mar 2

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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