Abstract
The fullerenes, C60 and C70, are molecules whose properties have been receiving increasing attention. Their high degree of symmetry and their three dimensional π—electron systems make them intriguing candidates for their potential nonlinear optical (NLO) properties. In order to investigate the resonant third—order optical response we have performed time resolved degenerate four—wave mixing (DFWM) experiments on films of pure C60 and pure C70 at 597 and 675 nm using an amplified ps laser system. The films were made by vapor deposition and characterized by FTIR and UV—Visible absorption spectroscopies.
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