Dresden 2017 – wissenschaftliches Programm
CPP 26.2: Vortrag
Dienstag, 21. März 2017, 14:15–14:30, ZEU 260
Tuning nonradiative lifetimes via molecular aggregation — •Alan Celestino and Alexander Eisfeld — MPIPKS, Dresden, Germany
We show that molecular aggregation can strongly influence the nonradiative decay (NRD) lifetime of an electronic excitation. As a demonstrative example, we consider a transition-dipole-dipole-interacting dimer whose monomers have harmonic potential energy surfaces (PESs). Depending on the position of the NRD channel (qnr), we find that the NRD lifetime (τnrdim) can exhibit a completely different dependence on the intermolecular-interaction strength. We observe that (i) for qnr near the Franck-Condon region, τnrdim increases with the interaction strength; (ii) for qnr near the minimum of the monomer excited PES, the intermolecular interaction has little influence on τnrdim; (iii) for qnr near the classical turning point of the monomer nuclear dynamics, on the other side of the minimum, τnrdim decreases with the interaction strength.
 arXiv:1611.09115 [physics.chem-ph]