Femtosecond Photophysics of Molecular Polaritons

Francesca Fassioli, Kyu Hyung Park, Sarah E. Bard, Gregory D. Scholes

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Molecular polaritons are hybrid states of photonic and molecular character that form when molecules strongly interact with light. Strong coupling tunes energy levels and, importantly, can modify molecular properties (e.g., photoreaction rates), opening an avenue for novel polariton chemistry. In this Perspective, we focus on the collective aspects of strongly coupled molecular systems and how this pertains to the dynamical response of such systems, which, though of key importance for attaining modified function under polariton formation, is still not well-understood. We discuss how the ultrafast time and spectral resolution make pump-probe spectroscopy an ideal tool to reveal the energy-transfer pathways from polariton states to other molecular states of functional interest. Finally, we illustrate how analyzing the free (rather than electronic) energy structure in molecular polariton systems may provide new clues into how energy flows and thus how strong coupling may be exploited.

Original languageEnglish (US)
Pages (from-to)11444-11459
Number of pages16
JournalJournal of Physical Chemistry Letters
Issue number46
StatePublished - Nov 25 2021

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Physical and Theoretical Chemistry


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