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    Emergence of higher-order topology in a loss-embedded kagome lattice

    Keran Li1,2, Chaohua Wu1,2, Juan Kang1,2,*, Shuo Liu1,2, Qinglong Zhang1,2, Diyuan Zheng3, Wansu Bao3, Yanyang Zhou3,†, and Gang Chen1,2,‡

    • *Contact author: jkang@zzu.edu.cn
    • †Contact author: zyy@qiclab.cn
    • ‡Contact author: chengang971@163.com

    Phys. Rev. A 113, 043523 – Published 28 April, 2026

    DOI: https://doi.org/10.1103/x7c6-hlql

    Abstract

    We demonstrate, both theoretically and experimentally, a non-Hermitian super-kagome lattice in which higher-order topological corner states emerge solely through the embedding of loss sites. By employing isospectral reduction, we elucidate the underlying mechanism of loss-induced topology. This approach allows direct manipulation of topological states simply by tuning the loss, without altering the coupling parameters. Experimentally, we observe zero-energy corner states in non-Hermitian super-kagome waveguide lattices, in agreement with our theoretical predictions. Our findings open alternative avenues for realizing and controlling topological states, offering innovative strategies for light manipulation and the development of next-generation photonic devices.

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