Plasmonic nanoparticles and metasurfaces to realize Fano spectra at ultraviolet wavelengths

Author/Creator ORCID

Date

2013-10-01

Department

Program

Citation of Original Publication

Christos Argyropoulos et al., Plasmonic nanoparticles and metasurfaces to realize Fano spectra at ultraviolet wavelengths, Applied Physics Letters Volume 103, Issue 14 (2013), https://doi-org/10.1063/1.4823575

Rights

This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
Public Domain Mark 1.0
© 2013 AIP Publishing LLC.

Subjects

Abstract

We discuss the possibility to realize sharp Fano scattering signatures in the ultraviolet (UV) range, based on dipolar scattering of nanoparticles. At these frequencies, material losses usually do not allow sharp resonant effects, hindering plasmonic applications based on higher-order multipolar modes, like conventional Fano resonances. We propose to excite degenerate scattering states supported by core-shell nanoparticles made of a sapphire core and an aluminum shell. We predict enhanced, highly confined fields, supporting sharp far-field scattering signatures from single nanoparticles and planar arrays of them. These results may lead to the design of UV filters, photodetectors, sensors, and energy-harvesting devices.