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arXiv · 2607.21389

Polaritons of inherently interacting molecules

Gábor J. Halász·Csaba Fábri·Lorenz S. Cederbaum·Ágnes Vibók
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Abstract

We investigate the absorption spectra of molecular ensembles strongly coupled to a Fabry-P\'erot cavity and establish the microscopic origin of collective polaritonic bands. We show that long-range intermolecular interactions generate a large manifold of hybrid molecular-photonic states, even without disorder, vibrations, or thermal effects. The observed polariton bands are collective envelopes of these microscopic states, making photonic and molecular spectra strongly dependent on molecular arrangement. Our findings identify long-range intermolecular interactions as a key ingredient of molecular cavity QED.

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Gábor J. Halász, Csaba Fábri, Lorenz S. Cederbaum, Ágnes Vibók. 2026-07-23. Polaritons of inherently interacting molecules. https://arxiv.org/abs/2607.21389

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