Cavity quantum electrodynamics with moiré photonic crystal nanocavity
Due to the existence of flatbands within the band structure, twisting photonics introduces a possibility to enhance the interaction between excitons in single QDs and cavity photons because of the extremely high quality factor (Q) in theory. In this work, we report a Purcell effect between single QDs and moiré photonic crystal nanocavities. The moiré photonic crystal nanocavities in a GaAs slab with QDs embedded are formed by twisting two layer photonic crystal structures with specific angles. High Q, low mode volume and large overlap between QDs and cavity mode field have been achieved by optimizing the filling ratio of the single-layer photonic crystal, with which a Q of fundamental modes about 2000 is experimentally demonstrated. A photoluminescence intensity enhancement of a factor about 8.4 is observed when a single QD is in resonance with a cavity mode, with a Purcell factor of about 3.0 confirmed through the lifetime measurement. This result shows the potential of moiré photonics to implement solid-state cavity quantum electrodynamics for future optical quantum information processing.
Authors
- Zhikai Ma (ORCID: https://orcid.org/0000-0002-5643-6589)
- Kuijuan Jin (ORCID: https://orcid.org/0000-0002-0047-4375)
- Sai Yan (ORCID: https://orcid.org/0000-0002-7781-8076)
- Hancong Li (ORCID: https://orcid.org/0009-0003-6700-8488)
- Shushu Shi (ORCID: https://orcid.org/0009-0008-2296-0594)
- Zhanchun Zuo (ORCID: https://orcid.org/0000-0001-5992-4011)
- Xiqing Chen (ORCID: https://orcid.org/0000-0002-5733-1850)
- Xiulai Xu (ORCID: https://orcid.org/0000-0001-8231-406X)
- Qihuang Gong (ORCID: https://orcid.org/0000-0003-4974-6244)
- Danjie Dai (ORCID: https://orcid.org/0009-0008-9133-8256)
- Deyan Dai (ORCID: https://orcid.org/0009-0005-6389-6232)
- Wubin Dai (ORCID: https://orcid.org/0000-0002-9038-7207)
- Yu Yuan (ORCID: https://orcid.org/0009-0000-9215-619X)
- Bowen Fu (ORCID: https://orcid.org/0000-0002-4921-3491)
- Can Wang (ORCID: https://orcid.org/0000-0002-4404-7957)
- Rui Zhu (ORCID: https://orcid.org/0000-0003-2032-6449)
- Longlong Yang (ORCID: https://orcid.org/0009-0005-1677-8495)
- Hanqing Liu (ORCID: https://orcid.org/0009-0004-7092-2382)
- Zhichuan Niu (ORCID: https://orcid.org/0000-0002-9566-6635)
- Jingnan Yang
- Haiqiao Ni
Institutions
- King University (US)
- Shanxi University (CN)
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- Songshan Lake Materials Laboratory (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Institute of Semiconductors (CN)
- Institute of Physics (CN)
- National Laboratory for Superconductivity (CN)
- University of Chinese Academy of Sciences (CN)
Publication Details
- Journal
- Nature Communications
- Published
- 2025-05-19
- DOI
- https://doi.org/10.1038/s41467-025-59942-5
- Citations
- 7
- Primary Topic
- Photonic Crystals and Applications
- Type
- article
- Field-Weighted Citation Impact
- 8.73
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China