Thetransitionfromthebiexcitontotheexcitoncanturnoverthedirectionoftheelectricdipoleofapolymericmolecule.Thisturning-overactioncombinedwiththephotoinducedpolarizationreversioncanbeusedasaswitch.Theswitchingspeedisgovernedbytherelaxationtimeoftheturning-overprocess,whichcanbedeterminedbyadynamicalsimulation.