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Cavity quantum electrodynamics with moiré photonic crystal nanocavity

Author

Listed:
  • Sai Yan

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Hancong Li

    (Peking University)

  • Jingnan Yang

    (Peking University)

  • Xiqing Chen

    (Peking University)

  • Hanqing Liu

    (Institute of Semiconductors, Chinese Academy of Sciences)

  • Deyan Dai

    (Institute of Semiconductors, Chinese Academy of Sciences)

  • Rui Zhu

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Zhikai Ma

    (Peking University)

  • Shushu Shi

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Longlong Yang

    (Peking University)

  • Yu Yuan

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Wenshuo Dai

    (Peking University)

  • Danjie Dai

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Bowen Fu

    (Peking University)

  • Zhanchun Zuo

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Haiqiao Ni

    (Institute of Semiconductors, Chinese Academy of Sciences)

  • Zhichuan Niu

    (Institute of Semiconductors, Chinese Academy of Sciences)

  • Can Wang

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Dongguan)

  • Kuijuan Jin

    (Institute of Physics, Chinese Academy of Sciences
    University of Chinese Academy of Sciences
    Dongguan)

  • Qihuang Gong

    (Peking University)

  • Xiulai Xu

    (Peking University
    Nantong
    Shanxi University, Taiyuan)

Abstract

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.

Suggested Citation

  • Sai Yan & Hancong Li & Jingnan Yang & Xiqing Chen & Hanqing Liu & Deyan Dai & Rui Zhu & Zhikai Ma & Shushu Shi & Longlong Yang & Yu Yuan & Wenshuo Dai & Danjie Dai & Bowen Fu & Zhanchun Zuo & Haiqiao , 2025. "Cavity quantum electrodynamics with moiré photonic crystal nanocavity," Nature Communications, Nature, vol. 16(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-59942-5
    DOI: 10.1038/s41467-025-59942-5
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