Abstract
We report measurements of the nonlinear refractive index, , of nickel oxide nanoparticles (NPs) in toluene at . The measurements were performed using the Z-scan technique with laser pulses at . Large values of in the range of were measured, and negligible two-photon absorption coefficient was estimated for colloids having NP filling fractions in the range of .
© 2007 Optical Society of America
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