title: Photon antibunching and collective effects in the fluorescence of single bichromophoric molecules.
abstract: The fluorescence of individual pairs of perylenemonoimide chromophores coupled via a short rigid linker is investigated. Photon antibunching is reported, indicating collective effects in the fluorescence, which are further substantiated by the observation of collective triplet off times and triplet lifetime shortening. The experimental findings are analyzed in terms of singlet-singlet and singlet-triplet annihilation based on Förster type energy transfer. The results reported here demonstrate that the statistical properties of the emission light of isolated single quantum systems can serve as a hallmark of intermolecular interactions.
authors.affiliation: Institut für Physikalische Chemie, Johannes Gutenberg-Universität, Welderweg 11, D-55099 Mainz, Germany.
authors.forename: Christian G
authors.initials: CG
authors.lastname: Hübner
authors.forename: Gert
authors.initials: G
authors.lastname: Zumofen
authors.forename: Alois
authors.initials: A
authors.lastname: Renn
authors.forename: Andreas
authors.initials: A
authors.lastname: Herrmann
authors.forename: Klaus
authors.initials: K
authors.lastname: Müllen
authors.forename: Thomas
authors.initials: T
authors.lastname: Basché