Charged Polaron Polaritons in an Organic Semiconductor Microcavity

We report strong coupling between light and polaron optical excitations in a doped organic semiconductor microcavity at room temperature. Codepositing MoO_{3} and the hole transport material 4, 4^{'}-cyclohexylidenebis[N, N-bis(4-methylphenyl)benzenamine] introduces a large hole density with a...

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Bibliographic Details
Published inPhysical review letters Vol. 120; no. 1; p. 017402
Main Authors Cheng, Chiao-Yu, Dhanker, Rijul, Gray, Christopher L, Mukhopadhyay, Sukrit, Kennehan, Eric R, Asbury, John B, Sokolov, Anatoliy, Giebink, Noel C
Format Journal Article
LanguageEnglish
Published United States 05.01.2018
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Summary:We report strong coupling between light and polaron optical excitations in a doped organic semiconductor microcavity at room temperature. Codepositing MoO_{3} and the hole transport material 4, 4^{'}-cyclohexylidenebis[N, N-bis(4-methylphenyl)benzenamine] introduces a large hole density with a narrow linewidth optical transition centered at 1.8 eV and an absorption coefficient exceeding 10^{4}  cm^{-1}. Coupling this transition to a Fabry-Pérot cavity mode yields upper and lower polaron polariton branches that are clearly resolved in angle-dependent reflectivity with a vacuum Rabi splitting ℏΩ_{R}>0.3  eV. This result establishes a path to electrically control polaritons in organic semiconductors and may lead to increased polariton-polariton Coulombic interactions that lower the threshold for nonlinear phenomena such as polariton condensation and lasing.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.120.017402