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Updated: Sep 13, 2025

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Reconfigurable non-Abelian integrated photonics.

Shijie Sun1, Xibin Wang2, Shangrong Li1

  • 1State Key Laboratory of Integrated Optoelectronics, JLU Region, College of Electronic Science and Engineering, Jilin University, Changchun, China.

Nature Communications
|August 1, 2025
PubMed
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Researchers developed reconfigurable non-Abelian photonic devices using thermo-optic effects. This breakthrough enables broadband, robust integrated photonics, paving the way for advanced photonic applications.

Area of Science:

  • Photonics
  • Quantum Information Science
  • Materials Science

Background:

  • Integrated photonics often relies on resonant components, limiting device bandwidth and stability.
  • Geometric phase, a non-resonant effect, offers potential for broadband and robust photonic devices.
  • Reconfigurable non-Abelian photonic devices are essential for practical applications but remain challenging to implement.

Purpose of the Study:

  • To propose and demonstrate a universal approach for reconfigurable non-Abelian integrated photonics.
  • To utilize the thermo-optic effect for tuning photonic system Hamiltonians and geometric phase.
  • To experimentally realize a multi-mode non-Abelian braiding device.

Main Methods:

  • Employing the thermo-optic effect to dynamically tune the system's Hamiltonian.

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  • Designing and fabricating double-layered polymer integrated platforms.
  • Implementing tunable two-mode braiding building blocks for multi-mode operation.

    • Main Results:

    • Demonstrated a four-mode non-Abelian braiding device.
    • Successfully reconfigured the device to generate up to 24 unitary matrices from the braid group B₄.
    • Showcased the tunability and reconfigurability of the geometric phase matrix through thermal modulation.

    Conclusions:

    • The proposed thermo-optic approach provides a universal method for reconfigurable non-Abelian integrated photonics.
    • This work overcomes previous limitations, enabling the development of robust and broadband photonic devices.
    • The demonstrated device opens avenues for diverse applications in quantum computing and information processing.