Abstract
Recently fullerenes (a mixture of C60 and C70) have received considerable attention because these molecules possess strong nonlinear-optical behaviour. Both optical limiting response [1] and photorefractive properties [2] of C60-doped polymers have been observed. In this article, we report the observation of a large third-order nonlinear optical susceptibility in fullerene-doped polymer thin films with nanosecond laser pulses and discuss the mechanism responsible for the observed nonlinear susceptibility.
© 1993 Optical Society of America
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