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.
Localized surface plasmon resonances in gold nano-patches on a gallium nitride substrate / D’Antonio, P.; Inchingolo, A. V.; Perna, G.; Capozzi, V.; Stomeo, T.; De Vittorio, M.; Magno, G.; Grande, Marco; Petruzzelli, Vincenzo; D'Orazio, Antonella. - In: NANOTECHNOLOGY. - ISSN 0957-4484. - 23:45(2012). [10.1088/0957-4484/23/45/455709]
Localized surface plasmon resonances in gold nano-patches on a gallium nitride substrate
G. Magno;GRANDE, Marco;PETRUZZELLI, Vincenzo;D'ORAZIO, Antonella
2012-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.