Excitonic spectral features in strongly coupled organic polaritons

Justyna A. Ćwik, Peter Kirton, Simone De Liberato, Jonathan Keeling

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)


Starting from a microscopic model, we investigate the optical spectra of molecules in strongly coupled organic microcavities examining how they might self-consistently adapt their coupling to light. We consider both rotational and vibrational degrees of freedom, focusing on features which can be seen in the peak in the center of the spectrum at the bare excitonic frequency. In both cases we find that the matter-light coupling can lead to a self-consistent change of the molecular states, with consequent temperature-dependent signatures in the absorption spectrum. However, for typical parameters, these effects are much too weak to explain recent measurements. We show that another mechanism which naturally arises from our model of vibrationally dressed polaritons has the right magnitude and temperature dependence to be at the origin of the observed data.

Original languageEnglish
Article number033840
Number of pages12
JournalPhysical Review A
Issue number3
Publication statusPublished - 22 Mar 2016


  • excitonic spectral features
  • organic polaritons
  • molecules


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