Drastic reduction of plasmon damping in gold nanorods

Drastic reduction of plasmon damping in gold nanorods

The dephasing of particle plasmons is investigated using light-scattering spectroscopy on individual gold nanoparticles. We find a drastic reduction of the plasmon dephasing rate in nanorods as compared to small nanospheres due to a suppression of interband damping. The rods studied here also show v...

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Veröffentlicht in:Physical review letters 2002-02, Vol.88 (7), p.077402-077402, Article 077402
Hauptverfasser: Sönnichsen, C, Franzl, T, Wilk, T, von Plessen, G, Feldmann, J, Wilson, O, Mulvaney, P
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container_issue 7
container_start_page 077402
container_title Physical review letters
container_volume 88
creator Sönnichsen, C
Franzl, T
Wilk, T
von Plessen, G
Feldmann, J
Wilson, O
Mulvaney, P
description The dephasing of particle plasmons is investigated using light-scattering spectroscopy on individual gold nanoparticles. We find a drastic reduction of the plasmon dephasing rate in nanorods as compared to small nanospheres due to a suppression of interband damping. The rods studied here also show very little radiation damping, due to their small volumes. These findings imply large local-field enhancement factors and relatively high light-scattering efficiencies, making metal nanorods extremely interesting for optical applications. Comparison with theory shows that pure dephasing and interface damping give negligible contributions to the total plasmon dephasing rate.
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title Drastic reduction of plasmon damping in gold nanorods
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