Abstract

The change in the profile of a spectral hole can be used to detect tunneling processes in glassy matrices as well as light-induced changes of molecular configurations. The broadening of photochemical holes as well as hole-filling processes are very sensitive probes for molecular rearrangements arround the embedded dye molecules /1/. Light-induced spectral diffusion in polymeric systems is highly selective with respect to the optical excitation of vibrational modes of the surrounding molecular groups.

© 1994 Optical Society of America