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A combination of co...
A combination of concave/convex surfaces for field-enhancement optimization: the indented nanocone
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- Garcia-Etxarri, Aitzol (author)
- Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU),Stanford University
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- Apell, Peter, 1952 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Käll, Mikael, 1963 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Aizpurua, Javier (author)
- Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU)
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(creator_code:org_t)
- 2012
- 2012
- English.
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In: Optics Express. - 1094-4087 .- 1094-4087. ; 20:23, s. 25201-25212
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Abstract
Subject headings
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- We introduce a design strategy to maximize the Near Field (NF)enhancement on plasmonic antennas. We start by identifying and studyingthe basic electromagnetic effects that contribute to the electric near fieldenhancement. On a second step, we show how the concatenation of a convexand a concave surface allows merging all the effects on a single, continuousnanoantenna. As an example of this NF maximization strategy, we engineera nanostructure, the indented nanocone. This structure, combines all thestudied NF maximization effects with a synergistic boost provided bya Fano-like interference effect activated by the presence of the concavesurface. As a result, the antenna exhibits a NF amplitude enhancement of 800, which transforms into 1600 when coupled to a perfect metallicsurface. This strong enhancement makes the proposed structure a robustcandidate to be used in field enhancement based technologies. Furtherelaborations of the concept may produce even larger and more effectiveenhancements.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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