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

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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.73.155419

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https://doi.org/10.1103/PhysRevB.73.155419
 http://hdl.handle.net/11603/29238

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UMBC Physics Department

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https://orcid.org/0000-0002-6370-8765

Date

2006-04-17

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journal articles
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Citation of Original Publication

Pelton, Matthew, Mingzhao Liu, Sungnam Park, Norbert F. Scherer, and Philippe Guyot-Sionnest. “Ultrafast Resonant Optical Scattering from Single Gold Nanorods: Large Nonlinearities and Plasmon Saturation.” Physical Review B 73, no. 15 (April 17, 2006): 155419. https://doi.org/10.1103/PhysRevB.73.155419.

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©2006 American Physical Society

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Abstract

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.