title: Exciton Structure and Energy Transfer in the Fenna-Matthews-Olson Complex.
abstract: The Fenna-Matthews-Olson (FMO) photosynthetic complex found in green sulfur bacteria has over the last decades been one of the favorite "model" systems for biological energy transfer. However, even after 40 years of studies, quantitative knowledge about its energy-transfer properties is limited. Here, two-dimensional electronic spectroscopy with full polarization control is used to provide an accurate description of the electronic structure and population dynamics in the complex. The sensitivity of the technique has further allowed us to spectroscopically identify the eighth bacterio-chlorophyll molecule recently discovered in the crystal structure. The time evolution of the spectral structure, covering time scales from tens of femtoseconds up to a nanosecond, reflects the energy flow in FMO and enables us to extract an unambiguous energy-transfer scheme.
authors.affiliation: Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden.
authors.forename: Erling
authors.initials: E
authors.lastname: Thyrhaug
authors.affiliation: Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden.
authors.forename: Karel
authors.initials: K
authors.lastname: Žídek
authors.affiliation: Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden.|Institut für Physikalische und Theoretische Chemie, Universität Würzburg , Am Hubland, D-97074 Würzburg, Germany.
authors.forename: Jakub
authors.initials: J
authors.lastname: Dostál
authors.affiliation: Biology Centre CAS, Branišovská 31, and Faculty of Science, University of South Bohemia , Branišovská 1760, 370 05 České Budějovice, Czech Republic.
authors.forename: David
authors.initials: D
authors.lastname: Bína
authors.affiliation: Department of Chemical Physics, Lund University , P.O. Box 124, 22100 Lund, Sweden.
authors.forename: Donatas
authors.initials: D
authors.lastname: Zigmantas