Abstract
We report here the realization of large third-order nonlinear susceptibility, /spl xi//sup (3)/, from Au:dielectric (SiO/sub 2/ and TiO/sub 2/) composite films near the Au percolation threshold. The composite films were prepared by co-sputtering onto a fused silica substrate. The wavelength dependence of the /spl xi//sup (3)/ was measured by a degenerate four-wave mixing (DFWM) scheme, and its enhancement studied by time-resolved measurements.
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