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Proceedings Paper

Plasmonic-photonic resonances in nanostructured metallo-dielectric quasi-crystals: tuning and sensitivity analysis
Author(s): Armando Ricciardi; Alessio Crescitelli; Marco Consales; Vincenzo Galdi; Emanuela Esposito; Andrea Cusano
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Paper Abstract

We report the evidence of plasmonic-photonic resonances in hybrid metallo-dielectric quasi-crystal nanostructures composed of aperiodically-patterned low-contrast dielectric slabs backed on a metal layer. Via both experimental and numerical studies, we characterize these resonant phenomena with specific reference to the Ammann-Beenker (quasiperiodic, octagonal) tiling lattice geometry, and investigate the underlying physics. In particular, we show that, by comparison with standard periodic structures, a richer spectrum of resonant modes may be excited. Such modes are characterized by a distinctive plasmonic or photonic behavior, discriminated by their field distribution. Concerning the possible applications, we also explore the structure functionalization via nanosized high refractive index overlays (for resonance tuning and quality-factor enhancement), as well as its surface sensitivity to deposition of nanolayers of materials mimicking bio-molecular binding. Overall, our results indicate the possibility of exciting a wealth of resonant modes with state-of-the-art quality factors and sensing/tuning efficiencies, of potential interest for the development of high-performance optical devices for communications, energy and sensing applications.

Paper Details

Date Published: 30 January 2012
PDF: 7 pages
Proc. SPIE 8351, Third Asia Pacific Optical Sensors Conference, 83511Q (30 January 2012); doi: 10.1117/12.913430
Show Author Affiliations
Armando Ricciardi, Univ. degli Studi del Sannio (Italy)
Alessio Crescitelli, Univ. degli Studi del Sannio (Italy)
Marco Consales, Univ. degli Studi del Sannio (Italy)
Vincenzo Galdi, Univ. degli Studi del Sannio (Italy)
Emanuela Esposito, Insituto di Cibernetica (Italy)
Andrea Cusano, Univ. degli Studi del Sannio (Italy)

Published in SPIE Proceedings Vol. 8351:
Third Asia Pacific Optical Sensors Conference
John Canning; Gangding Peng, Editor(s)

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