Near-infrared exciton-polaritons in strongly coupled single-walled carbon nanotube microcavities

Arko Graf, Laura Tropf, Yuriy Zakharko, Jana Zaumseil () and Malte C. Gather ()
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Arko Graf: Institute for Physical Chemistry, Faculty of Chemistry and Earth Sciences, Universität Heidelberg
Laura Tropf: Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews
Yuriy Zakharko: Institute for Physical Chemistry, Faculty of Chemistry and Earth Sciences, Universität Heidelberg
Jana Zaumseil: Institute for Physical Chemistry, Faculty of Chemistry and Earth Sciences, Universität Heidelberg
Malte C. Gather: Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Exciton-polaritons form upon strong coupling between electronic excitations of a material and photonic states of a surrounding microcavity. In organic semiconductors the special nature of excited states leads to particularly strong coupling and facilitates condensation of exciton-polaritons at room temperature, which may lead to electrically pumped organic polariton lasers. However, charge carrier mobility and photo-stability in currently used materials is limited and exciton-polariton emission so far has been restricted to visible wavelengths. Here, we demonstrate strong light-matter coupling in the near infrared using single-walled carbon nanotubes (SWCNTs) in a polymer matrix and a planar metal-clad cavity. By exploiting the exceptional oscillator strength and sharp excitonic transition of (6,5) SWCNTs, we achieve large Rabi splitting (>110 meV), efficient polariton relaxation and narrow band emission (

Date: 2016
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DOI: 10.1038/ncomms13078

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