title: Superradiance at the localization-delocalization crossover in tubular chlorosomes.
abstract: We study the effect of disorder on spectral properties of tubular chlorosomes in green sulfur bacteria Cf. aurantiacus. Employing a Frenkel-exciton Hamiltonian with diagonal and off-diagonal disorder consistent with spectral and structural studies, we analyze excitonic localization and spectral statistics of the chlorosomes. A size-dependent localization-delocalization crossover is found to occur as a function of the excitonic energy. The crossover energy region coincides with the more optically active states with maximized superradiance and is, consequently, more conducive for energy transfer.
authors.affiliation: Instituto de Estructura de la Materia, IEM-CSIC, Serrano 123, Madrid 28006, Spain.
authors.forename: Rafael A
authors.initials: RA
authors.lastname: Molina
authors.affiliation: Instituto de Estructura de la Materia, IEM-CSIC, Serrano 123, Madrid 28006, Spain.
authors.forename: Enrique
authors.initials: E
authors.lastname: Benito-Matías
authors.affiliation: Division of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Alejandro D
authors.initials: AD
authors.lastname: Somoza
authors.affiliation: Division of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Lipeng
authors.initials: L
authors.lastname: Chen
authors.affiliation: Division of Materials Science, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798.
authors.forename: Yang
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D002876:Chromosomes, Bacterial / Q000378:metabolism*; D004735:Energy Transfer; D008954:Models, Biological