Coherent interaction of WS2 and quasi-2D perovskite excitons over micrometer distances via a cavity field
Abstract
The coherent coupling of cavity-confined photons and excitonic matter resonances leads to the formation of cavity polaritons, hybrid light-matter quasi-particles. If multiple exciton resonances couple to the same photonic mode, the resulting polariton constitutes a coherent interaction between matter resonances that can be spatially separated without any direct electronic coupling. In this work, we demonstrate the formation of such a coherent coupling at room temperature using an open optical cavity containing two distinct van der Waals materials - monolayer WS2 and layered quasi-2D halide perovskites (HaPs) - separated by 1.5 μm. The system forms three polariton branches, with the middle branch possessing nearly equal fractions of both excitons and the photonic mode. White-light reflectivity and luminescence measurements are in good agreement with simulations using a coupled harmonic oscillator and a microscopic Wannier-Hopfield framework. Our results lay the foundation to combine highly complementary degrees of freedom in 2D materials in an in-situ tunable fashion to enable new polaritonic functionalities.
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BibTeX
@misc{struve2026coherent,
title = {{Coherent interaction of WS$_2$ and quasi-2D perovskite excitons over micrometer distances via a cavity field}},
author = {Marti Struve and Hamid Pashaei Adl and Jamie M. Fitzgerald and Oliwia Janikowska and Maciej Śmiertka and Alessandro Surrente and Sven Stephan and Christoph Lienau and Falk Eilenberger and Zdeněk Sofer and Watcharaphol Paritmongkol and William A. Tisdale and Paulina Plochocka and Ermin Malic and Christian Schneider and Martin Esmann},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.03765},
eprint = {2609.03765},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.03765},
}
RIS
TY - UNPB
TI - Coherent interaction of WS_2 and quasi-2D perovskite excitons over micrometer distances via a cavity field
AU - Marti Struve
AU - Hamid Pashaei Adl
AU - Jamie M. Fitzgerald
AU - Oliwia Janikowska
AU - Maciej Śmiertka
AU - Alessandro Surrente
AU - Sven Stephan
AU - Christoph Lienau
AU - Falk Eilenberger
AU - Zdeněk Sofer
AU - Watcharaphol Paritmongkol
AU - William A. Tisdale
AU - Paulina Plochocka
AU - Ermin Malic
AU - Christian Schneider
AU - Martin Esmann
PY - 2026
DA - 2026/09/03
PB - arXiv
DO - 10.48550/arxiv.2609.03765
UR - https://arxiv.org/abs/2609.03765
AB - The coherent coupling of cavity-confined photons and excitonic matter resonances leads to the formation of cavity polaritons, hybrid light-matter quasi-particles. If multiple exciton resonances couple to the same photonic mode, the resulting polariton constitutes a coherent interaction between matter resonances that can be spatially separated without any direct electronic coupling. In this work, we demonstrate the formation of such a coherent coupling at room temperature using an open optical cavity containing two distinct van der Waals materials - monolayer WS2 and layered quasi-2D halide perovskites (HaPs) - separated by 1.5 μm. The system forms three polariton branches, with the middle branch possessing nearly equal fractions of both excitons and the photonic mode. White-light reflectivity and luminescence measurements are in good agreement with simulations using a coupled harmonic oscillator and a microscopic Wannier-Hopfield framework. Our results lay the foundation to combine highly complementary degrees of freedom in 2D materials in an in-situ tunable fashion to enable new polaritonic functionalities.
ER -