title: Weak exciton scattering in molecular nanotubes revealed by double-quantum two-dimensional electronic spectroscopy.
abstract: The two-exciton manifold of a double-wall cylindrical molecular aggregate is studied using a coherent third order optical technique. Experiments reveal the anharmonic character of the exciton bands. Atomistic simulations of the exciton-exciton scattering show that the excitons can be treated as weakly coupled hard-core bosons. The weak coupling stems from the extended exciton delocalization made possible by the nanotube geometry.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, China.
authors.forename: Darius
authors.initials: D
authors.lastname: Abramavicius
authors.forename: Alexandra
authors.initials: A
authors.lastname: Nemeth
authors.forename: Franz
authors.initials: F
authors.lastname: Milota
authors.forename: Jaroslaw
authors.initials: J
authors.lastname: Sperling
authors.forename: Shaul
authors.initials: S
authors.lastname: Mukamel
authors.forename: Harald F
authors.initials: HF
authors.lastname: Kauffmann
mesh_terms: D000042:Absorption; D002232:Carbocyanines / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D011789:Quantum Theory; D012542:Scattering, Radiation; D013057:Spectrum Analysis / Q000379:methods; D013816:Thermodynamics
chemical_list: D002232:Carbocyanines