Ultrafast energy transfer in the core light-harvesting complex of the photosynthetic bacterium Rhodobacter sphaeroides observed by fluorescence upconversion

S.E. Bradforth, Jimenez, R., Fidler, V., Fleming, G.R., Nagarajan, S., Norris, J., van Mourik, F., and van Grondelle, R., in Ultrafast Phenomena Ix, edited by G.A. Mourou, Zewail, A.H., Barbara, P.F., and Knox, W.H. (Springer-Verlag, Berlin, 1994).