Ultrafast optical properties of gold nanoshells
JOSA B, Vol. 16, Issue 10, pp. 1814-1823 (1999)
http://dx.doi.org/10.1364/JOSAB.16.001814
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Abstract
We present the results of ultrafast pump–probe measurements on films of gold-coated gold sulfide nanoshells. The measured change in transmission (ΔT/T) agrees with theoretical calculations that relate the increase in the electron temperature to changes in the Drude and interband components of the gold shell dielectric function. The major contribution physically corresponds to modified screening of the d-band electrons by the conduction electrons in the gold shell. The electrons cool with a lifetime of ∼1.6 ps, indicating a slower cooling rate than is observed in bulk gold.
© 1999 Optical Society of America
[Optical Society of America ]
OCIS Codes
(260.3910) Physical optics : Metal optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
Citation
Richard D. Averitt, Sarah L. Westcott, and Naomi J. Halas, "Ultrafast optical properties of gold nanoshells," J. Opt. Soc. Am. B 16, 1814-1823 (1999)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-16-10-1814
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