Ultrafast Dynamics of Gold Nanorods: Tuning between Photo-Bleaching and Photo-Induced Absorption

Details Ultrafast Dynamics of Gold Nanorods: Tuning between Photo-Bleaching and Photo-Induced Absorption Ultrafast Dynamics of Gold Nanorods: Tuning between Photo-Bleaching and Photo-Induced Absorption

2011-06-29

arxiv.org/abs/1106.5903v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, To appear in International Journal of Nanoscience, 2011

Scientific paper

We report ultrafast electron dynamics in gold nanorods investigated using 80 fs laser pulses centered at 1.57 eV. Five types of nanorod colloidal suspensions in water having their longitudinal surface plasmon peak (ELSP) on either side of the laser photon energy (EL) have been studied. For ELSP>EL, photo-induced absorption with single decay time constant is observed. On the other hand, for ELSP

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