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    Metacavity Quantum Electrodynamics

    Xueshi Li (李学诗)1,*, Ziwei Wang (王子维)2,*, Yan Chen (陈岩)1,*,†, Dong Liu (刘栋)3, Kaili Xiong (熊凯莉)1, Guangfeng Wang (王光丰)2, Jiantao Ma (马剑涛)3, Ying Yu (喻颖)3, Jiawei Wang (王嘉威)4 et al.

    Zhanling Wang (王占领)5, Xiao Li (李霄)6, Xianfeng Chen (陈险峰)2,7,8, Erez Hasman9, Bo Wang (王波)2,‡, Jin Liu (刘进)3,§, and Tian Jiang (江天)1,10,∥

    • *These authors contributed equally to this work.
    • †Contact author: chenyan@nudt.edu.cn
    • ‡Contact author: wangbo89@sjtu.edu.cn
    • §Contact author: liujin23@mail.sysu.edu.cn
    • ∥Contact author: tjiang@nudt.edu.cn

    Phys. Rev. Lett. 137, 023601 – Published 7 July, 2026

    DOI: https://doi.org/10.1103/j8gx-58hf

    Abstract

    Cavity quantum electrodynamics (cQED) harnesses light-matter interactions to produce nonclassical light states. However, a fundamental challenge lies in simultaneously achieving Purcell enhancement and tailored wave front control within a single cavity, due to conflicting resonator requirements. Here, we overcome this limitation by demonstrating triggered single-photon emission with customizable wave fronts from semiconductor quantum dots embedded in geometric-phase metacavities. These monolithic devices—only 200 nm thick—deliver Purcell-enhanced emission alongside spin-momentum-locked radiation, vortex beams, and holographic patterns depending on the design. The meta-atom lattice provides high-Q optical confinement, while spatially modulated orientations of the elliptical holes enable efficient outcoupling of photons with designed states. This Letter establishes a new paradigm for intrinsically multiplexing metasurface-based wave front shaping with cQED, enabling high-performance quantum light sources from subwavelength-scale monolithic platforms.

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