G.R. Fleming, A. Tokmakoff, and J.-Y. Yu,

Department of Chemistry, University of California, Berkeley, Physical BioSciences Division, Lawrence Berkeley National Laboratory,
(; fax: (510)-642-6340)

Photon echo spectroscopy can reveal the underlying microscopic dynamics in complex systems such as liquids, solutions, and proteins. Examples will be given of two-dimensional non-resonant spectroscopy in pure liquids and liquid mixtures and resonant photon echo studies of solutions and protein complexes such as photosynthetic light harvesting complexes. The photon echo method can reveal dynamical processes such as energy and electron transfer and provides a sensitive means to characterize the dielectric properties of proteins.

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