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Tunable electrical, optical and plasmonic properties of multifunctional meta-structures based on alternative plasmonic materials.

Mancarella C., Moscardi L., Lamperti A., Terraneo G., Sygletou M., Bricchi B.R., Stasi L., Tovaglieri L., Bisio F., Scotognella F., Li Bassi A.
  Lunedì 12/09   14:00 - 19:00   Aula D - Marianna Ciccone   II - Fisica della materia   Presentazione
At present, the established potentialities of plasmonic effects in boosting light-matter interactions are at the basis for next-generation metamaterials merging multifunctionality, tunability of properties and broader spectral responses. The archetypal plasmonic materials, $i.e.$, noble metals, show limited modulation outside the visible spectrum. This justifies the spreading interest for alternatives (transparent conductive oxides, transition metal nitrides or oxynitrides) and periodically arranged multi-phase nanostructures, where the high level of control in carrier concentration is achievable directly at synthesis or with an "active" approach ($e.g.$, external bias). In this framework, we present a variety of original multilayers and nanocomposites fabricated in one-step, for instance 1-D photonic crystals or hyperbolic metamaterials, to fulfill tailorable plasmonic/photonic behaviours from VIS to IR, while controlling nanoscale morphology, structure, and electrical performances. The list of practical applications includes, but is not limited to, plasmon-functionalised transparent electrodes, biosensors, optoelectronic elements for color manipulation and thermophotovoltaic emitters.