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Peer-reviewedCC BYNanophotonics (Berlin, Germany)

Conversion of Spin-Orbit-Coupled Optical Vortices via Complex Coupling.

  • Jinze Gao1
  • Xin Xie1
  • Kun Liao1
  • Xiaoyong Hu1,2,3,4
4 affiliations
  1. 1State Key Laboratory for Mesoscopic Physics & Department of Physics Collaborative Innovation Center of Quantum Matter & Frontiers Science Center for Nano-optoelectronics Peking University Beijing China.
  2. 2Key Laboratory for Advanced Optoelectronic Integrated Chips of Jiangsu Province Peking University Yangtze Delta Institute of Optoelectronics Nantong Jiangsu China.
  3. 3Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan Shanxi China.
  4. 4Hefei National Laboratory Hefei China.
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Abstract

Optical vortices provide an additional freedom because of the orbital angular momentum (OAM), enabling significant advances in high-dimensional information encoding, quantum communication, and super-resolution imaging. However, the controlled conversion between spin-orbit-coupled (SOC) optical vortices of different orders remains challenging. Here, we propose a novel four-step Floquet driving protocol governed by complex coupling to realize conversion between distinct angular momentum characteristics in strongly confined waveguide arrays. Optical vortices naturally give rise to complex-valued coupling coefficients owing to their intrinsic spatial-phase structure and spin-orbit interaction. Building on this mechanism, we implement a Floquet driving protocol in the waveguide array, which supports corner and edge states determined by the coupling parameters. Exploiting the corner states, we demonstrate dynamic conversion of total-angular-momentum order from j to -j across successive two or three driving periods. This work opens a pathway toward dynamic modulation of structured light and advances the integration of OAM-based functionalities in photonic platforms.

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Cite

BibTeXRIS
BibTeX
@article{gao2026conversion,
  title = {{Conversion of Spin-Orbit-Coupled Optical Vortices via Complex Coupling.}},
  author = {Jinze Gao and Xin Xie and Kun Liao and Xiaoyong Hu},
  journal = {Nanophotonics (Berlin, Germany)},
  year = {2026},
  month = oct,
  doi = {10.1002/nap2.70337},
  url = {https://europepmc.org/article/MED/42921012},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Conversion of Spin-Orbit-Coupled Optical Vortices via Complex Coupling.
AU  - Jinze Gao
AU  - Xin Xie
AU  - Kun Liao
AU  - Xiaoyong Hu
PY  - 2026
DA  - 2026/10/23
JO  - Nanophotonics (Berlin, Germany)
DO  - 10.1002/nap2.70337
UR  - https://europepmc.org/article/MED/42921012
AB  - Optical vortices provide an additional freedom because of the orbital angular momentum (OAM), enabling significant advances in high-dimensional information encoding, quantum communication, and super-resolution imaging. However, the controlled conversion between spin-orbit-coupled (SOC) optical vortices of different orders remains challenging. Here, we propose a novel four-step Floquet driving protocol governed by complex coupling to realize conversion between distinct angular momentum characteristics in strongly confined waveguide arrays. Optical vortices naturally give rise to complex-valued coupling coefficients owing to their intrinsic spatial-phase structure and spin-orbit interaction. Building on this mechanism, we implement a Floquet driving protocol in the waveguide array, which supports corner and edge states determined by the coupling parameters. Exploiting the corner states, we demonstrate dynamic conversion of total-angular-momentum order from j to -j across successive two or three driving periods. This work opens a pathway toward dynamic modulation of structured light and advances the integration of OAM-based functionalities in photonic platforms.
SN  - 2192-8606
SN  - 2192-8614
ER  -