Díaz E, Martínez-Calzada GC, Cabrera-Granado E, Calderón OG. Increasing applicability of slow light in molecular aggregate nanofilms with two-exciton dynamics.
OPTICS LETTERS 2016;
41:2569-2572. [PMID:
27244416 DOI:
10.1364/ol.41.002569]
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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.
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