Theory predicts UV/vis-to-IR photonic down conversion mediated by excited state vibrational polaritons.

ABSTRACT: This work proposes a photophysical phenomenon whereby ultraviolet/visible (UV/vis) excitation of a molecule involving a Franck-Condon (FC) active vibration yields infrared (IR) emission by strong coupling to an optical cavity. The resulting UV/vis-to-IR photonic down conversion process is mediated by vibrational polaritons in the electronic excited state potential. It is shown that the formation of excited state vibrational polaritons (ESVP) via UV/vis excitation only involve vibrational modes with both a non-zero FC activity and IR activity in the excited state. Density functional theory calculations are used to identify 1-Pyreneacetic acid as a molecule with this property and the dynamics of ESVP are modeled. Overall, this work introduces an avenue of polariton chemistry where excited st

SUBMITTER: Terry Weatherly CK 

PROVIDER: S-EPMC10412565 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature