Topological Fermi-polaron Polaritons with Electrically Invertible Topology
Abstract
Topological polaritons provide a route to engineer optical Chern bands, but realizing large gaps or efficient electrical tunability remains challenging because time-reversal-symmetry breaking in semiconductor polariton systems is typically limited by weak Zeeman splittings. Here, we demonstrate a topological Bose-Fermi mixture --- Fermi-polaron polaritons ---where large gaps and electrically invertible topology emerge from the interplay of Fermi-polaron many-body interactions, photonic symmetry, and strong light--matter coupling. Using a gate-controlled monolayer transition-metal dichalcogenide integrated with a symmetry-engineered photonic crystal, we create Fermi-polaron polaritons with topological band structures. The direct coupling between band topology and gate-tunable many-body interactions provides a mechanism for amplified time-reversal-symmetry breaking beyond bare Zeeman splitting and enables electrical inversion of topological gaps, Berry curvature, and Chern numbers. These results establish an electrically reconfigurable platform for interaction-driven topological states and programmable topological photonics.
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BibTeX
@misc{xie2026topological,
title = {{Topological Fermi-polaron Polaritons with Electrically Invertible Topology}},
author = {Xin Xie and Chenxi Liu and Yuze Liu and Lingxiao Zhou and Chulwon Lee and Yuhan Zhang and Nathanial Lydick and Kenji Watanabe and Takashi Taniguchi and Kai Sun and Hui Deng},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.39791},
eprint = {2609.39791},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.39791},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Topological Fermi-polaron Polaritons with Electrically Invertible Topology
AU - Xin Xie
AU - Chenxi Liu
AU - Yuze Liu
AU - Lingxiao Zhou
AU - Chulwon Lee
AU - Yuhan Zhang
AU - Nathanial Lydick
AU - Kenji Watanabe
AU - Takashi Taniguchi
AU - Kai Sun
AU - Hui Deng
PY - 2026
DA - 2026/09/30
PB - arXiv
DO - 10.48550/arxiv.2609.39791
UR - https://arxiv.org/abs/2609.39791
AB - Topological polaritons provide a route to engineer optical Chern bands, but realizing large gaps or efficient electrical tunability remains challenging because time-reversal-symmetry breaking in semiconductor polariton systems is typically limited by weak Zeeman splittings. Here, we demonstrate a topological Bose-Fermi mixture --- Fermi-polaron polaritons ---where large gaps and electrically invertible topology emerge from the interplay of Fermi-polaron many-body interactions, photonic symmetry, and strong light--matter coupling. Using a gate-controlled monolayer transition-metal dichalcogenide integrated with a symmetry-engineered photonic crystal, we create Fermi-polaron polaritons with topological band structures. The direct coupling between band topology and gate-tunable many-body interactions provides a mechanism for amplified time-reversal-symmetry breaking beyond bare Zeeman splitting and enables electrical inversion of topological gaps, Berry curvature, and Chern numbers. These results establish an electrically reconfigurable platform for interaction-driven topological states and programmable topological photonics.
ER -