When polarons meet polaritons: Exciton-vibration interactions in organic molecules strongly coupled to confined light fields

Abstract

We present a microscopic semi-analytical theory for the description of organic molecules interacting strongly with a cavity mode. Exciton-vibration coupling within the molecule and exciton-cavity interaction are treated on an equal footing by employing a temperature-dependent variational approach. The interplay between strong exciton-vibration coupling and strong exciton-cavity coupling gives rise to a hybrid ground state, which we refer to as the lower polaron polariton. Explicit expressions for the ground-state wave function, the zero-temperature quasiparticle weight of the lower polaron polariton, the photoluminescence line strength, and the mean number of vibrational quanta are obtained in terms of the optimal variational parameters. The dependence of these quantities upon the exciton-cavity coupling strength reveals that strong cavity coupling leads to an enhanced vibrational dressing of the cavity mode, and at the same time a vibrational decoupling of the dark excitons, which in turn results in a lower polaron polariton resembling a single-mode dressed bare lower polariton in the strong-coupling regime. Thermal effects on several observables are briefly discussed.

15 pages, 7 figures, Physical Review B 94, 195409 (2016)

References in corpus (6)

• Realizing strong light-matter interactions between single nanoparticle plasmons and molecular excitons at ambient conditions
• Coherent coupling of molecular resonators with a micro-cavity mode
• Quantum dot Rabi rotations beyond the weak exciton-phonon coupling regime
• Microscopic theory of phonon-induced effects on semiconductor quantum dot decay dynamics in cavity QED
• Quantum simulation of small-polaron formation with trapped ions
• Raman scattering with strongly coupled vibron-polaritons

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