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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 6 — Jun. 1, 2008
  • pp: 945–950

Nonlinear optical properties of a gold-silica composite with high gold fill fraction and the sign change of its nonlinear absorption coefficient

Giovanni Piredda, David D. Smith, Bettina Wendling, and Robert W. Boyd  »View Author Affiliations


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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