  In this supplementary material, we recollect, for reader's convenience, the
general scheme of suggested multiscale model (Sec. 1), and basic informations
about approaches used for pilot study: a detailed description of the
interaction model (Sec. 2) and dynamical methods used for the dark dynamics
step (Sec. 3) reported previously in two preceding studies [1, 2]. In addition,
a detailed description of the treatment of radiative processes is also given
(Sec. 4).
