Nonlinear optical properties of a gold-silica composite with high gold fill fraction and the sign change of its nonlinear absorption coefficient
JOSA B, Vol. 25, Issue 6, pp. 945-950 (2008)
http://dx.doi.org/10.1364/JOSAB.25.000945
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Abstract
We study the intensity-dependent absorption coefficient of gold-silica composites as a function of fill fraction at frequencies near the plasmon resonance. The samples we have studied act as saturable absorbers at all wavelengths and all fill fractions, whereas pure gold is an optical limiter. We provide an explanation based on the intensity-dependent damping of the surface plasmon for this reversal of the sign of the nonlinear absorption.
© 2008 Optical Society of America
OCIS Codes
(160.3900) Materials : Metals
(160.4330) Materials : Nonlinear optical materials
ToC Category:
Materials
History
Original Manuscript: January 10, 2008
Manuscript Accepted: February 21, 2008
Published: May 15, 2008
Citation
Giovanni Piredda, David D. Smith, Bettina Wendling, and Robert W. Boyd, "Nonlinear optical properties of a gold-silica composite with high gold fill fraction and the sign change of its nonlinear absorption coefficient," J. Opt. Soc. Am. B 25, 945-950 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-6-945
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