Signatures of Plexcitonic States in Molecular Electroluminescence

Abstract We develop a quantum master equation (QME) approach to investigate the electroluminesence (EL) of molecules confined between metallic electrodes and coupled to quantum plasmonic modes. Within our general state-based framework, we describe electronic tunneling, vibrational damping, environme...

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Bibliographic Details
Published inScientific reports Vol. 8; no. 1; pp. 1 - 9
Main Authors Bergfield, Justin P., Hendrickson, Joshua R.
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group 02.02.2018
Nature Publishing Group UK
Subjects
Electromagnetic fields
Quantum theory
Short term memory
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Summary:Abstract We develop a quantum master equation (QME) approach to investigate the electroluminesence (EL) of molecules confined between metallic electrodes and coupled to quantum plasmonic modes. Within our general state-based framework, we describe electronic tunneling, vibrational damping, environmental dephasing, and the quantum coherent dynamics of coupled quantum electromagnetic field modes. As an example, we calculate the STM-induced spontaneous emission of a tetraphenylporphyrin (TPP) molecule coupled to a nanocavity plasmon. In the weak molecular exciton-plasmon coupling regime we find excellent agreement with experiments, including above-threshold hot luminescence, an effect not described by previous semiclassical calculations. In the strong coupling regime, we analyze the spectral features indicative of the formation of plexcitonic states.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-19382-2