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Proceedings Paper

Up-scalable low-cost fabrication of plasmonic and photonic nanostructures for sensing
Author(s): Benjamin Gallinet; Laurent Davoine; Guillaume Basset; Marc Schnieper
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Paper Abstract

The fabrication by nanoimprint lithography of large-area plasmonic and photonic sensing platforms is reported. The plasmonic nanostructures have the shape of split–ring resonators and support both electric dipole and quadrupole modes. They carry the spectral signature of Fano resonances. Their near-field and far-field optical properties are investigated with an analytical model together with numerical calculations. Fano-resonant systems combine strong nanoscale light confinement with a narrow spectral line width, which makes them very promising for biochemical sensing and immunoassays. On the other hand, chemical sensors based on resonant gratings are obtained by patterning a sol-gel material, evaporating a high refractive index semiconductor and coating with a chemically sensitive dye layer. By exposition to a liquid or an invisible gas such as ammonium, the change in absorption is detected optically. An analytical model is introduced to explain the enhancement of the signal by the resonant grating, which can be detected with the naked eye from a color change of the reflected light.

Paper Details

Date Published: 19 September 2013
PDF: 6 pages
Proc. SPIE 8818, Nanostructured Thin Films VI, 88180Z (19 September 2013); doi: 10.1117/12.2023341
Show Author Affiliations
Benjamin Gallinet, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Laurent Davoine, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Guillaume Basset, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)
Marc Schnieper, Ctr. Suisse d'Electronique et de Microtechnique SA (Switzerland)

Published in SPIE Proceedings Vol. 8818:
Nanostructured Thin Films VI
Tom G. Mackay; Akhlesh Lakhtakia; Yi-Jun Jen; Motofumi Suzuki, Editor(s)

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