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Proceedings Paper

Nonlinear optical properties of quantum sized gold clusters
Author(s): Guda Ramakrishna; Oleg Varnavski; Junhyung Kim; Dongil Lee; Theodore Goodson
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Paper Abstract

Gold clusters with the sizes close to the Fermi wavelength of electron shows interesting quantum size effects. Linear and nonlinear optical properties show dramatic trends when the sizes of clusters are in the range of quantum confinement. We have investigated the size dependence of the non-linear optical property of two-photon absorption (TPA) cross-sections of the gold clusters. Absolute TPA cross-sections are measured by a combination of one and two-photon excited fluorescence upconversion measurements. Large cross-sections and abrupt changes in the trend of cross-sections are observed in the size-dependence when size is reduced from nanoparticles to cluster. The results can be attributed to the appearance of quantum confinement in these monolayer protected gold clusters.

Paper Details

Date Published: 2 September 2008
PDF: 12 pages
Proc. SPIE 7049, Linear and Nonlinear Optics of Organic Materials VIII, 70490L (2 September 2008); doi: 10.1117/12.798260
Show Author Affiliations
Guda Ramakrishna, Univ. of Michigan (United States)
Oleg Varnavski, Univ. of Michigan (United States)
Junhyung Kim, Western Michigan Univ. (United States)
Dongil Lee, Western Michigan Univ. (United States)
Theodore Goodson, Western Michigan Univ. (United States)

Published in SPIE Proceedings Vol. 7049:
Linear and Nonlinear Optics of Organic Materials VIII
Rachel Jakubiak, Editor(s)

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