Journal
APPLIED PHYSICS LETTERS
Volume 98, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3588393
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- French National Research Agency
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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 mu 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. (C) 2011 American Institute of Physics. [doi:10.1063/1.3588393]
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