Ultrafast resonant optical scattering from single gold nanorods: Large nonlinearities and plasmon saturation

Matthew Pelton, Mingzhao Liu, Sungnam Park, Norbert F. Scherer, Philippe Guyot-Sionnest

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We measure nonlinear optical scattering from individual Au nanorods excited by ultrafast laser pulses on resonance with their longitudinal plasmon mode. Isolating single rods removes inhomogeneous broadening and allows the measurement of a large nonlinearity, much greater than that of nanorod ensembles. Surprisingly, the ultrafast nonlinearity can be attributed entirely to heating of conduction electrons and does not exhibit any response associated with coherent plasmon oscillation. This indicates an unanticipated damping of strongly driven plasmons.

Original languageEnglish
Article number155419
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number15
Publication statusPublished - 2006 Apr 24
Externally publishedYes


ASJC Scopus subject areas

  • Condensed Matter Physics

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