Hybrid organic-metallic colloids consisting of Au and Ag nanoparticles dispersed in two different ionic liquids were synthesized. Using the Z-scan technique, it was observed that both media presented large nonlinear optical responses owing to the thermal and the electronic contribution to the nonlinear refractive index enhanced by the presence of the metallic particles. Our results indicate that these systems are promising candidates to the development of nonlinear optical applications.

© 2010 Optical Society of America

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