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Asymmetric topological pumping in nonparaxial photonics

Author

Listed:
  • Qingqing Cheng

    (University of Shanghai for Science and Technology)

  • Huaiqiang Wang

    (Nanjing University
    University of Zurich)

  • Yongguan Ke

    (Sun Yat-Sen University (Zhuhai Campus)
    State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University (Guangzhou Campus))

  • Tao Chen

    (University of Shanghai for Science and Technology)

  • Ye Yu

    (University of Shanghai for Science and Technology)

  • Yuri S. Kivshar

    (Nonlinear Physics Centre, Research School of Physics, Australian National University)

  • Chaohong Lee

    (Sun Yat-Sen University (Zhuhai Campus)
    State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University (Guangzhou Campus))

  • Yiming Pan

    (Physics Department and Solid State Institute, Technion)

Abstract

Topological photonics was initially inspired by the quantum-optical analogy between the Schrödinger equation for an electron wavefunction and the paraxial equation for a light beam. Here, we reveal an unexpected phenomenon in topological pumping observed in arrays of nonparaxial optical waveguides where the quantum-optical analogy becomes invalid. We predict theoretically and demonstrate experimentally an asymmetric topological pumping when the injected field transfers from one side of the waveguide array to the other side whereas the reverse process is unexpectedly forbidden. Our finding could open an avenue for exploring topological photonics that enables nontrivial topological phenomena and designs in photonics driven by nonparaxiality.

Suggested Citation

  • Qingqing Cheng & Huaiqiang Wang & Yongguan Ke & Tao Chen & Ye Yu & Yuri S. Kivshar & Chaohong Lee & Yiming Pan, 2022. "Asymmetric topological pumping in nonparaxial photonics," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-021-27773-9
    DOI: 10.1038/s41467-021-27773-9
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