Universität Würzburg, Institut für Physikalische und Theoretische Chemie, Am Hubland , Campus Nord, Emil-Fischer-Str. 42, 97074 Würzburg, Germany.
Struct Dyn. 2015 Nov 17;3(4):043201. doi: 10.1063/1.4936127. eCollection 2016 Jul.
A site specific perturbation of a photo-excited molecular aggregate can lead to a localization of excitonic energy. We investigate this localization dynamics for laser-prepared excited states. Changing the parameters of the electric field significantly influences the exciton localization which offers the possibility for a selective control of this process. This is demonstrated for aggregates possessing a single vibrational degree of freedom per monomer unit. It is shown that the effects identified for the molecular dimer can be generalized to larger aggregates with a high density of vibronic states.
光激发分子聚集体的局域化可以导致激子能量的局域化。我们研究了激光制备的激发态的这种局域化动力学。改变电场的参数会显著影响激子的局域化,从而为这种过程的选择性控制提供了可能性。对于每个单体单元具有单个振动自由度的聚集体,证明了这一点。结果表明,对于分子二聚体确定的效应可以推广到具有高密度振动态的较大聚集体。