Total funneling of light in high aspect ratio plasmonic nanoresonators

We demonstrate the total extinction of the reflectivity for a transverse magnetic polarized wave on a gold surface etched on 6% of its area by both narrow (150 nm) and deep ( 2   μ m ) grooves. These high aspect ratio metallic grooves were fabricated using a mold cast technique based on an electroly...

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Bibliographic Details
Published in:Applied physics letters 2011-05, Vol.98 (19), p.191109-191109-3
Main Authors: Bouchon, Patrick, Pardo, Fabrice, Portier, Benjamin, Ferlazzo, Laurence, Ghenuche, Petru, Dagher, Gulnar, Dupuis, Christophe, Bardou, Nathalie, Haïdar, Riad, Pelouard, Jean-Luc
Format: Article
Language:English
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Summary:We demonstrate the total extinction of the reflectivity for a transverse magnetic polarized wave on a gold surface etched on 6% of its area by both narrow (150 nm) and deep ( 2   μ m ) grooves. These high aspect ratio metallic grooves were fabricated using a mold cast technique based on an electrolytic growth of gold. They exhibit two resonance peaks corresponding to the first and second cavity modes inside the grooves. We also evidence the incidence-invariance of their spectral response, which undoubtedly shows the localized nature of the resonances. These experimental results confirm the prediction of total funneling of light in very narrow grooves.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3588393