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Realization of all-band-flat photonic lattices

Author

Listed:
  • Jing Yang

    (Zhejiang University
    Zhejiang University
    Zhejiang University)

  • Yuanzhen Li

    (Zhejiang University
    Zhejiang University)

  • Yumeng Yang

    (Zhejiang University
    Zhejiang University)

  • Xinrong Xie

    (Zhejiang University
    Zhejiang University)

  • Zijian Zhang

    (Zhejiang University
    Zhejiang University)

  • Jiale Yuan

    (Zhejiang University)

  • Han Cai

    (Zhejiang University
    Zhejiang University)

  • Da-Wei Wang

    (Zhejiang University
    Zhejiang University
    University of Chinese Academy of Sciences)

  • Fei Gao

    (Zhejiang University
    Zhejiang University
    Zhejiang University)

Abstract

Flatbands play an important role in correlated quantum matter and have promising applications in photonic lattices. Synthetic magnetic fields and destructive interference in lattices are traditionally used to obtain flatbands. However, such methods can only obtain a few flatbands with most bands remaining dispersive. Here we realize all-band-flat photonic lattices of an arbitrary size by precisely controlling the coupling strengths between lattice sites to mimic those in Fock-state lattices. This allows us to go beyond the perturbative regime of strain engineering and group all eigenmodes in flatbands, which simultaneously achieves high band flatness and large usable bandwidth. We map out the distribution of each flatband in the lattices and selectively excite the eigenmodes with different chiralities. Our method paves a way in controlling band structure and topology of photonic lattices.

Suggested Citation

  • Jing Yang & Yuanzhen Li & Yumeng Yang & Xinrong Xie & Zijian Zhang & Jiale Yuan & Han Cai & Da-Wei Wang & Fei Gao, 2024. "Realization of all-band-flat photonic lattices," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45580-w
    DOI: 10.1038/s41467-024-45580-w
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    References listed on IDEAS

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