Exciton-polaritons - coherently hybridized states of excitons and photons - are instrumental for solid-state nonlinear optics and quantum simulations. To enable engineered polariton energy landscapes and interactions, local control over the particle-like states can be achieved by tuning the properties of the exciton constituent. Monolayer transition metal dichalcogenides stand out in this respect, as they readily allow for a deterministic, flexible and scalable control of excitons, and thus of hybrid exciton-polaritons, via environmental dielectric engineering. Here, we demonstrate the realization of mesoscopic exciton-polariton domains in a structured dielectric exciton environment, and establish an effective long-range exciton hopping in the dispersive regime of cavity-coupling. Our results represent a crucial step toward interacting polaritonic networks and quantum simulations in exciton-polariton lattices based on dielectrically tailored two-dimensional semiconductors.
@article{arxiv.2506.05561,
title = {Cavity-mediated exciton hopping in a dielectrically engineered polariton system},
author = {Lukas Husel and Farsane Tabataba-Vakili and Johannes Scherzer and Lukas Krelle and Ismail Bilgin and Samarth Vadia and Kenji Watanabe and Takashi Taniguchi and Iacopo Carusotto and Alexander Högele},
journal= {arXiv preprint arXiv:2506.05561},
year = {2025}
}