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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 …
International Society for Optics and Photonics
Publication date: 
30 Jan 2012

Armando Ricciardi, Alessio Crescitelli, Marco Consales, Vincenzo Galdi, Emanuela Esposito, Andrea Cusano

Biblio References: 
Volume: 8351 Pages: 83511Q
Third Asia Pacific Optical Sensors Conference