Abstract
Excited state dynamics of C 60 have been studied using backward degenerate four wave mixing with incoherent light. Estimates of the population relaxation time T 1 of the lower excited singlet state S 1 and phase relaxation time T 2 of the higher excited singlet state S n are obtained. The vibrational dephasing in the S 1 state is ∼5 ps. The results are in good agreement with those obtained using a fs laser. We also present Z-scan data at 600 nm.
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