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J Phys Chem Lett. 2018 Sep 6;9(17):4848-4851. doi: 10.1021/acs.jpclett.8b02032. Epub 2018 Aug 13.

Coherent Light Harvesting through Strong Coupling to Confined Light.

Author information

1
Department of Chemistry and Nanoscience Center , P.O. Box 35, FIN-40014 University of Jyväskylä , Finland.
2
Department of Physics and Nanoscience Center , P.O. Box 35, FIN-40014 University of Jyväskylä , Finland.

Abstract

When photoactive molecules interact strongly with confined light modes, new hybrid light-matter states may form: the polaritons. These polaritons are coherent superpositions of excitations of the molecules and of the cavity photon. Recently, polaritons were shown to mediate energy transfer between chromophores at distances beyond the Förster limit. Here we explore the potential of strong coupling for light-harvesting applications by means of atomistic molecular dynamics simulations of mixtures of photoreactive and non-photo-reactive molecules strongly coupled to a single confined light mode. These molecules are spatially separated and present at different concentrations. Our simulations suggest that while the excitation is initially fully delocalized over all molecules and the confined light mode, it very rapidly localizes onto one of the photoreactive molecules, which then undergoes the reaction.

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