Vibration-assisted exciton transfer in molecular aggregates strongly coupled to confined light fields

Jingyu Liu, Qing Zhao, Ning Wu

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We investigate exciton transport through one-dimensional molecular aggregates interacting strongly with a cavity mode. Unlike several prior theoretical studies treating the monomers as simple two-level systems, exciton-vibration coupling is explicitly included in the description of open quantum dynamics of the system. In the framework of the Holstein-Tavis-Cummings model with truncated vibrational space, we investigate the steady-state exciton transfer through both a molecular dimer and longer molecular chains. For a molecular dimer, we find that vibration-assisted exciton transfer occurs at strong exciton-cavity coupling regime where the vacuum Rabi splitting matches the frequency of a single vibrational quantum, whereas for longer molecular chains, vibration-assisted transfer is found to occur at the ultrastrong exciton-cavity coupling limit. In addition, finite relaxation of vibrational modes induced by the continuous phonon bath is found to further facilitate the exciton transport in vibrational enhancement regimes.

Original languageEnglish
Article number105102
JournalJournal of Chemical Physics
Volume150
Issue number10
DOIs
Publication statusPublished - 14 Mar 2019

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