Abstract

Numerous studies to date are devoted to a photon echo spectroscopy of a dissolved dye molecule. Because most dyes exhibit vibronic features in their absorption spectra for impulsive excitation, the initially excited state is a vibronic wave packet. Shank and coworkers were the first to recognize the importance of vibrational mode suppression toward optical dephasing measurements.¹ Mode suppression by time-integrated on a slow detector stimulated photon echo, however, works only in systems that exhibit Bloch- like dynamics, meaning that the echo peaks at the time equal to the delay between the first excitation pulses.

© 1996 Optical Society of America