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Optical vortex ladder via Sisyphus pumping of Pseudospin

Author

Listed:
  • Sihong Lei

    (Nankai University)

  • Shiqi Xia

    (Nankai University)

  • Daohong Song

    (Nankai University
    Shanxi University)

  • Jingjun Xu

    (Nankai University)

  • Hrvoje Buljan

    (Nankai University
    Bijenička c. 32)

  • Zhigang Chen

    (Nankai University
    Shanxi University)

Abstract

Robust high-order optical vortices are much in demand for applications in optical manipulation, optical communications, quantum entanglement and quantum computing. However, in numerous experimental settings, a controlled generation of optical vortices with arbitrary orbital angular momentum remains a challenge. Here, we present a concept of “optical vortex ladder” for the stepwise generation of optical vortices through Sisyphus pumping of pseudospin modes in photonic graphene. The ladder is applicable in various lattices with Dirac-like structures. Instead of conical diffraction and incomplete pseudospin conversion under conventional Gaussian beam excitations, the vortices produced in the ladder arise from non-trivial topology and feature diffraction-free Bessel profiles, thanks to the refined excitation of the ring spectrum around the Dirac cones. By employing a periodic “kick” to the photonic graphene, effectively inducing the Sisyphus pumping, the ladder enables tunable generation of optical vortices of any order even when the initial excitation does not involve any orbital angular momentum. The optical vortex ladder stands out as an intriguing non-Hermitian dynamical system, and, among other possibilities, opens a pathway for applications of topological singularities in beam shaping and wavefront engineering.

Suggested Citation

  • Sihong Lei & Shiqi Xia & Daohong Song & Jingjun Xu & Hrvoje Buljan & Zhigang Chen, 2024. "Optical vortex ladder via Sisyphus pumping of Pseudospin," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-52070-6
    DOI: 10.1038/s41467-024-52070-6
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    References listed on IDEAS

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    1. Alois Mair & Alipasha Vaziri & Gregor Weihs & Anton Zeilinger, 2001. "Entanglement of the orbital angular momentum states of photons," Nature, Nature, vol. 412(6844), pages 313-316, July.
    2. Zengkai Shao & Jiangbo Zhu & Yujie Chen & Yanfeng Zhang & Siyuan Yu, 2018. "Spin-orbit interaction of light induced by transverse spin angular momentum engineering," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
    3. Zhifeng Zhang & Haoqi Zhao & Shuang Wu & Tianwei Wu & Xingdu Qiao & Zihe Gao & Ritesh Agarwal & Stefano Longhi & Natalia M. Litchinitser & Li Ge & Liang Feng, 2022. "Spin–orbit microlaser emitting in a four-dimensional Hilbert space," Nature, Nature, vol. 612(7939), pages 246-251, December.
    4. Daohong Song & Vassilis Paltoglou & Sheng Liu & Yi Zhu & Daniel Gallardo & Liqin Tang & Jingjun Xu & Mark Ablowitz & Nikolaos K. Efremidis & Zhigang Chen, 2015. "Unveiling pseudospin and angular momentum in photonic graphene," Nature Communications, Nature, vol. 6(1), pages 1-7, May.
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