Room-Temperature Exciton Polaritons in Monolayer WS<sub>2</sub> Enabled by Plasmonic Bound States in the Continuum
Exciton polaritons formed by the strong coupling between excitons and photons have been extensively studied in transition metal disulfides (TMDs) for their potential to inherit ultralong radiation lifetime and remarkable nonlinearity. Many studies have achieved strong coupling at room temperature. However, the systems in these studies generally lack orderly characteristics and precise controllability, and their tunability also remains rather limited. Here, we demonstrate a plasmonic grating with a bound state in the continuum (BIC) as a highly tunable platform for generating exciton polaritons in monolayer WS<sub>2</sub> at room temperature. We characterized the polariton modes and determined an energy splitting of 93 meV. This validates strong coupling in our system. Our research offers a new approach for exploring exciton polaritons in 2D semiconductors, opening doors for room-temperature optoelectronic and quantum computing applications.
Authors
- Cai Luo (ORCID: https://orcid.org/0009-0000-6540-9606)
- Nannan Hu (ORCID: https://orcid.org/0000-0003-3159-3518)
- Pinxu Li (ORCID: https://orcid.org/0000-0001-8888-1903)
- Baoli Liu (ORCID: https://orcid.org/0000-0002-0828-5093)
- Wenyao Chang (ORCID: https://orcid.org/0000-0003-2507-0948)
- Yang Guo (ORCID: https://orcid.org/0000-0001-8975-9387)
- Yang Yang (ORCID: https://orcid.org/0000-0003-3785-9233)
- Ziyi Fu (ORCID: https://orcid.org/0009-0008-6165-2535)
- Zhi‐Xiang Yu (ORCID: https://orcid.org/0000-0003-0939-9727)
- Changzhi Gu (ORCID: https://orcid.org/0000-0002-2689-2807)
- Shibing Tian
- Xin Huang
- Jianmei Li (ORCID: https://orcid.org/0000-0002-5529-5251)
- Haifang Yang
- Baogang Quan (ORCID: https://orcid.org/0000-0002-9353-6044)
- Wei Li (ORCID: https://orcid.org/0009-0001-8423-0553)
- Aizi Jin
Institutions
- Chinese Academy of Sciences (CN)
- Yanshan University (CN)
- Physical Sciences (United States) (US)
- Tsinghua–Berkeley Shenzhen Institute (CN)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Institute of Physics (CN)
- University of Chinese Academy of Sciences (CN)
- Tsinghua University (CN)
Publication Details
- Journal
- Nano Letters
- Published
- 2025-03-05
- DOI
- https://doi.org/10.1021/acs.nanolett.4c06464
- Citations
- 12
- Primary Topic
- Strong Light-Matter Interactions
- Type
- article
- Field-Weighted Citation Impact
- 14.96
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Department of Education of Hebei Province
- National Key Research and Development Program of China