Díaz García, ElenaCabrera Granado, EduardoGómez Calderón, Óscar2023-06-182023-06-182016-05-250146-959210.1364/OL.41.002569https://hdl.handle.net/20.500.14352/23081© 2016 Optical Society of America. Funding. MINECO (MAT2013-46308, FIS2013- 41709-P).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.engjournal articlehttp://dx.doi.org/10.1364/OL.41.002569https://www.osapublishing.org/open access538.9621.38537.8004.42Slow-lightMolecular aggregatesExciton dynamicsFísica (Física)ElectromagnetismoElectrónica (Física)Física de materialesFísica del estado sólidoÓptica (Física)Programación de ordenadores (Física)Química física (Física)22 Física2202 Electromagnetismo2211 Física del Estado Sólido2209.19 Óptica Física2210 Química Física