title: Localized surface plasmon resonances in gold nano-patches on a gallium nitride substrate.
abstract: In this paper we describe the design, fabrication and characterization of gold nano-patches, deposited on gallium nitride substrate, acting as optical nanoantennas able to efficiently localize the electric field at the metal-dielectric interface. We analyse the performance of the proposed device, evaluating the transmission and the electric field localization by means of a three-dimensional finite difference time domain (FDTD) method. We detail the fabrication protocol and show the morphological characterization. We also investigate the near-field optical transmission by means of scanning near-field optical microscope measurements, which reveal the excitation of a localized surface plasmon resonance at a wavelength of 633 nm, as expected by the FDTD calculations. Such results highlight how the final device can pave the way for the realization of a single optical platform where the active material and the metal nanostructures are integrated together on the same chip.
authors.affiliation: Dipartimento di Medicina Clinica e Sperimentale, Università di Foggia, Foggia, Italy.
authors.forename: Palma
authors.initials: P
authors.lastname: D'Antonio
authors.forename: Alessio Vincenzo
authors.initials: AV
authors.lastname: Inchingolo
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Perna
authors.forename: Vito
authors.initials: V
authors.lastname: Capozzi
authors.forename: Tiziana
authors.initials: T
authors.lastname: Stomeo
authors.forename: Massimo
authors.initials: M
authors.lastname: De Vittorio
authors.forename: Giovanni
authors.initials: G
authors.lastname: Magno
authors.forename: Marco
authors.initials: M
authors.lastname: Grande
authors.forename: Vincenzo
authors.initials: V
authors.lastname: Petruzzelli
authors.forename: Antonella
authors.initials: A
authors.lastname: D'Orazio
mesh_terms: D004867:Equipment Design; D005708:Gallium / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: C473348:gallium nitride; D006046:Gold; D005708:Gallium