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Proceedings Paper

Plasmonic coaxial Fabry-Pérot nanocavity color filter
Author(s): G. Y. Si; E. S. P. Leong; A. J. Danner; J. H. Teng
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Paper Abstract

Plamonic coaxial structures have drawn considerable attetion recently because of their unique properties. They exhibit different mechanisms of extraordinary optical transmission observed from subwavelength holes and they can support localized Fabry-Pérot plasmon modes. In this work, we experimentally demonstrate color filters based on coaxial structures fabricated in optically thick metallic films. Using nanogaps with different apertures from 160 nm down to only 40 nm, we show varying color outputs when the annular aperture arrays are illuminated with a broadband light source. Effective color-filter function is demonstrated in the optical regime. Different color outputs are observed and optical spectra are measured. In such structures, it is the propagating mode playing an important role rather than the evanescent. Resonances depend strongly on ring apertures, enabling devices with tunability of output colors using simple geometry control.

Paper Details

Date Published: 11 September 2010
PDF: 5 pages
Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, 77573F (11 September 2010); doi: 10.1117/12.861151
Show Author Affiliations
G. Y. Si, National Univ. of Singapore (Singapore)
E. S. P. Leong, A*STAR Institute of Materials Research and Engineering (Singapore)
A. J. Danner, National Univ. of Singapore (Singapore)
J. H. Teng, A*STAR Institute of Materials Research and Engineering (Singapore)


Published in SPIE Proceedings Vol. 7757:
Plasmonics: Metallic Nanostructures and Their Optical Properties VIII
Mark I. Stockman, Editor(s)

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