title: Biexciton resonance energy transfer in a model photosystem.
abstract: The absorption of two photons by a concentrated assembly of identical chromophores can lead to formation of a biexciton. This work concerns the transfer of biexcitonic energy from a ring to a central donor, with a particular focus on rates and geometric effects. Quantum amplitudes are expressed in terms of orientation factors with a clear physical significance and detailed calculations are performed on an idealised, three-fold symmetric photosystem-a structural motif common in a variety of natural and artificial light-harvesting systems.
authors.affiliation: School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, NorfolkUKNR4 7TJ.
authors.forename: Robert D
authors.initials: RD
authors.lastname: Jenkins
authors.forename: David L
authors.initials: DL
authors.lastname: Andrews
mesh_terms: D004735:Energy Transfer; D008027:Light; D008962:Models, Theoretical; D010788:Photosynthesis / Q000502:physiology*; D045322:Photosynthetic Reaction Center Complex Proteins / Q000502:physiology / Q000528:radiation effects
chemical_list: D045322:Photosynthetic Reaction Center Complex Proteins