Four-wave spectroscopy of excited organic molecules
Bogdanov V. L. , Kulya S. V. , Neporent B. S. , Spiro A. G.
The dispersion of the cubic nonlinear susceptibility of excited 1,4-diphenylbutadiene molecules has been measured. A comparison of the results with model-based calculations yields the mechanisms and time scales of the ultrafast relaxation processes for highly excited electronic states.