title: Near-infrared exciton-polaritons in strongly coupled single-walled carbon nanotube microcavities.
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 (<15 meV). Given their high charge carrier mobility and excellent photostability, SWCNTs represent a promising new avenue towards practical exciton-polariton devices operating at telecommunication wavelengths.
authors.affiliation: Institute for Physical Chemistry, Faculty of Chemistry and Earth Sciences, Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany.|Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK.
authors.forename: Arko
authors.initials: A
authors.lastname: Graf
authors.affiliation: Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK.
authors.forename: Laura
authors.initials: L
authors.lastname: Tropf
authors.affiliation: Institute for Physical Chemistry, Faculty of Chemistry and Earth Sciences, Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany.
authors.forename: Yuriy
authors.initials: Y
authors.lastname: Zakharko
authors.affiliation: Institute for Physical Chemistry, Faculty of Chemistry and Earth Sciences, Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany.
authors.forename: Jana
authors.initials: J
authors.lastname: Zaumseil
authors.affiliation: Organic Semiconductor Centre, SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews KY16 9SS, UK.
authors.forename: Malte C
authors.initials: MC
authors.lastname: Gather