Exciton-Polariton Dynamics in Multilayered Materials

• URL: http://arxiv.org/abs/2502.12933v1
• Date: Tue, 18 Feb 2025 15:15:07 GMT
• Title: Exciton-Polariton Dynamics in Multilayered Materials
• Authors: Saeed Rahmanian Koshkaki, Arshath Manjalingal, Logan Blackham, Arkajit Mandal,
• Abstract summary: Coupling excitons with quantized radiation has been shown to enable coherent ballistic transport at room temperature inside optical cavities. We develop an efficient mixed-quantum-classical approach to simulate the exciton-polariton quantum dynamics. We find that this enhanced coherence can be traced to a synchronization of phonon fluctuations over multiple layers.
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• Abstract: Coupling excitons with quantized radiation has been shown to enable coherent ballistic transport at room temperature inside optical cavities. Previous theoretical works employ a simple description of the material, depicting it as a single layer placed in the middle of the optical cavity, thereby ignoring the spatial variation of the radiation in the cavity quantization direction. In contrast, in most experiments, the optical cavity is filled with organic molecules or multilayered materials. Here, we develop an efficient mixed-quantum-classical approach, introducing a {\it bright layer} description, to simulate the exciton-polariton quantum dynamics. Our simulations reveal that, for the same Rabi splitting, a multilayer material extends the quantum coherence lifetime and enhances transport compared to a single-layer material. We find that this enhanced coherence can be traced to a synchronization of phonon fluctuations over multiple layers, wherein the collective light-matter coupling in a multilayered material effectively suppresses the phonon-induced dynamical disorder.

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