title: Quantum coherence and disorder-specific effects in simulations of 2D optical spectra of one-dimensional J-aggregates.
abstract: Time-resolved two-dimensional photon-echo (2D PE) spectra of linear J-aggregates containing four molecules per unit cell--a model system for a concentrated water solution of the pseudo-isocyanine dye--is theoretically considered. Analysis of a single unit cell and the full-sized aggregate is consistently carried out. Spectral features of a single unit cell are sorted out by assigning them to specific double-sided Feynman diagrams. Two different approaches of disorder are employed, the resulting differences in the spectra are discussed, and the conditions for their utilization are described. Special attention is paid to quantum coherence dynamics of a single unit cell and the full-sized J-aggregate. Possibilities of probing quantum coherences, as well as performing quantum control via two-color 2D PE spectroscopy, are discussed.
authors.affiliation: Department of Theoretical Physics, Faculty of Physics of Vilnius University, Sauletekio Avenue 9, build. 3, LT-10222 Vilnius, Lithuania.
authors.forename: V
authors.initials: V
authors.lastname: Butkus
authors.forename: A
authors.initials: A
authors.lastname: Gelzinis
authors.forename: L
authors.initials: L
authors.lastname: Valkunas
mesh_terms: D004396:Coloring Agents / Q000737:chemistry; D056951:Photoelectron Spectroscopy / Q000592:standards*; D011789:Quantum Theory; D012015:Reference Standards; D012996:Solutions; D014867:Water / Q000737:chemistry
chemical_list: D004396:Coloring Agents; D012996:Solutions; D014867:Water