Measurement and Reduction of Damping in Plasmonic Nanowires

We report on a spectroscopic study of surface plasmon damping and group velocity in polycrystalline silver and gold nanowires. By comparing to single-crystalline wires and by using different substrates, we quantitatively deduce the relative damping contributions due to metal crystallinity and absorp...

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Veröffentlicht in:	Nano letters 2012-02, Vol.12 (2), p.661-665
Hauptverfasser:	Kusar, Primoz, Gruber, Christian, Hohenau, Andreas, Krenn, Joachim R
Format:	Artikel
Sprache:	eng
Schlagworte:	Absorption Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) Condensed matter: electronic structure, electrical, magnetic, and optical properties Damping Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Exact sciences and technology Gold - chemistry Metal Nanoparticles - chemistry Nanostructure Nanowires Networks Oxidation-Reduction Particle Size Physics Plasmonics Reduction Silver Silver - chemistry Surface and interface electron states Surface Plasmon Resonance Surface Properties Wire
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Beschreibung
Zusammenfassung:	We report on a spectroscopic study of surface plasmon damping and group velocity in polycrystalline silver and gold nanowires. By comparing to single-crystalline wires and by using different substrates, we quantitatively deduce the relative damping contributions due to metal crystallinity and absorption in the substrate. Compared to absorbing substrates, we find strongly reduced plasmonic damping for polycrystalline nanowires on quartz substrates, enabling the application of such wires for plasmonic waveguide networks.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl203452d