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Proceedings Paper

Optically detected coherent picosecond lattice oscillations in two dimensional arrays of gold nanocrystals of different sizes and shapes induced by femtosecond laser pulses
Author(s): Wenyu Huang; Wei Qian; Mostafa A. El-Sayed
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Paper Abstract

The nanosphere lithography (NSL) technique is used to make periodic gold array of prismatic nanoparticles. We use the femtosecond time resolved double beam transient optical detection to determine the coherent lattice oscillation in gold nanoparticles. Coherent lattice oscillation is compared on gold nanoparticles of different sizes and shapes. The effect of changing shape on the oscillation period was studied. Different environmental effects on the coherent lattice oscillation are eliminated by measuring the oscillation of the prismatic shape before and after we anneal it to spherical shape of the same number of atoms. A large change in the oscillation period is observed which agrees with the calculated period using different equations for the corresponding shapes.

Paper Details

Date Published: 26 August 2005
PDF: 9 pages
Proc. SPIE 5927, Plasmonics: Metallic Nanostructures and Their Optical Properties III, 592701 (26 August 2005); doi: 10.1117/12.620501
Show Author Affiliations
Wenyu Huang, Georgia Institute of Technology (United States)
Wei Qian, Georgia Institute of Technology (United States)
Mostafa A. El-Sayed, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 5927:
Plasmonics: Metallic Nanostructures and Their Optical Properties III
Mark I. Stockman, Editor(s)

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