Polariton Formation from Soret Band Excitons in Metal-Organic Frameworks and Plasmonic Lattices

Alexander D. Sample, Jun Guan, Jingtian Hu, Francisco Freire-Fernández, Sang Min Park, Richard D. Schaller, George C. Schatz, Teri W. Odom*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This Letter describes strong coupling between a plasmonic nanoparticle (NP) lattice cavity and Soret excitons in a metal-organic framework (MOF) film. In optical transmission measurements, we observed a lower polariton mode that can be spectrally tuned by infiltrating MOF pores with solvents of different refractive index. Using transient absorption spectroscopy, both the lower and upper polariton modes can be resolved, with an estimated Rabi splitting of ∼300 meV, nearly twice that of other plasmonic cavity-organic emitter systems. The polariton modes decay more rapidly than that of the uncoupled exciton. This hybrid system highlights the advantages of open plasmonic cavities for tunable coupling and the use of transient absorption spectroscopy to identify polariton modes.

Original languageEnglish (US)
Pages (from-to)18778-18783
Number of pages6
JournalJournal of Physical Chemistry C
Volume126
Issue number44
DOIs
StatePublished - Nov 10 2022

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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