Localized Plasmon Resonances in Gold and Silver Microcones Fabricated Using Single-Pulse Femtosecond Nanoprocessing

Abstract:

In this paper we report on the one-step fabrication of silver and gold conical microstructures using femtosecond single-pulse nanoablation. The lateral and vertical size of the microcones was found to be fully determined by the pulse energy. Using dark-field confocal microspectroscopy technique we observe and measure the resonant light scattering from the individual nanostructures in visible spectral range with the resonant peak position being dependent on the microcone size. This resonant light scattering was attributed to the excitation of the localized surface plasmon modes in the upper part of the microcones, where the main part of the molten materials accumulates and resolidifies during the formation process. The plasmon-mediated EM field enhancement near the microcones was experimentally probed and revealed by means of photoluminescent (PL) microscopy. The averaged 6-fold enhancement of the PL signal from the layer of alkylated europium complex embedded into the organic matrix was experimentally demonstrated.

• Periodical: Solid State Phenomena (Volume 247)
• Pages: 39-46
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.247.39
• Online since: March 2016
• Authors: Aleksandr A. Kuchmizhak*, Oleg B. Vitrik, Y.N. Kulchin
• Keywords: Laser Material Processing, Localized Plasmon Resonances, Microcones, Nanostructures, Noble Metal Films, Photoluminescence Enhancement

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