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Proceedings Paper

Thermal optical nonlinearity enhanced by gold nanoparticles
Author(s): Rogério F. Souza; Márcio A. R. C. Alencar; César M. Nascimento; Monique G. A. da Silva; Mario R. Meneghetti; Jandir M. Hickmann
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Paper Abstract

We report on the observation of a large thermal nonlinearity of an organic material enhanced by the presence of gold nanoparticles. The studied system consisted of a colloid of castor oil and gold particles with average diameter of 10 nm, with filling factor of 4.0x10-5. Z-scan measurements were performed for an excitation wavelength tuned at 810 nm in the CW regime. It was observed that this colloidal system presents a large thermal nonlinear refractive index, which was equal to -7.4x10-8 cm2/W. This value is about 41 times larger than the n2 of the host material. The thermo-optic coefficient of the colloid was also evaluated, and a large enhancement was observed in its value owing to the presence of the gold nanoparticles in the organic material.

Paper Details

Date Published: 11 September 2006
PDF: 8 pages
Proc. SPIE 6323, Plasmonics: Metallic Nanostructures and their Optical Properties IV, 63231T (11 September 2006); doi: 10.1117/12.680072
Show Author Affiliations
Rogério F. Souza, Ctr. Federal de Educação Tecnológica de Alagoas (Brazil)
Márcio A. R. C. Alencar, Univ. Federal de Alagoas (Brazil)
César M. Nascimento, Univ. Federal de Alagoas (Brazil)
Monique G. A. da Silva, Univ. Federal de Alagoas (Brazil)
Mario R. Meneghetti, Univ. Federal de Alagoas (Brazil)
Jandir M. Hickmann, Univ. Federal de Alagoas (Brazil)

Published in SPIE Proceedings Vol. 6323:
Plasmonics: Metallic Nanostructures and their Optical Properties IV
Mark I. Stockman, Editor(s)

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