title: Increasing applicability of slow light in molecular aggregate nanofilms with two-exciton dynamics.
abstract: We study the slow-light performance in the presence of exciton-exciton interaction in films of linear molecular aggregates at the nanometer scale. In particular, we consider a four-level model to describe the creation/annihilation of two-exciton states that are relevant for high-intensity fields. Numerical simulations show delays comparable to those obtained for longer propagation distances in other media. Two-exciton dynamics could lead to larger fractional delays, even in presence of disorder, in comparison to the two-level approximation. We conclude that slow-light performance is a robust phenomenon in these systems under the increasing complexity of the two-exciton dynamics.
authors.forename: E
authors.initials: E
authors.lastname: Díaz
authors.forename: G C
authors.initials: GC
authors.lastname: Martínez-Calzada
authors.forename: E
authors.initials: E
authors.lastname: Cabrera-Granado
authors.forename: O G
authors.initials: OG
authors.lastname: Calderón