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

被引：112

作者：

Pelton, M

Liu, MZ

Park, S

Scherer, NF

Guyot-Sionnest, P

机构：

[1] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[2] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

[3] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.73.155419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

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页数：6

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