Novel detection scheme for application in pump–repump–probe spectroscopy

Optics Communications, 2010, 283, 1050-4 published on 01.05.2010
Optics Communications, online article
A novel detection scheme for pump–repump–probe spectroscopy is presented, where the use of modulation and referencing allows to record the efficiency of a photochemical reaction as a function of the pump–repump delay in a single measurement. This new technique is applied to investigate the ringopening reaction of an indolylfulgide after pre-excitation. Here the reaction efficiency doubles, when the excitation pulse is very close to the pre-excitation pulse, and the improvement of the efficiency decays with increasing pump–repump delay on the time scale of about 5 ps.

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