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Nanophotonic chip-space interfaces for multidimensional nonlinear optics.

Dunzhao Wei1, Bo Chen2, Shuai Wan3,4

  • 1State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, Guangzhou, China. weidzh@mail.sysu.edu.cn.

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|April 3, 2026
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Summary
This summary is machine-generated.

Researchers created reconfigurable chip-space interfaces using thin-film lithium niobate. This platform engineers structured light, enabling tunable optical skyrmions and vortex microcombs for advanced photonic technologies.

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Area of Science:

  • Integrated Photonics
  • Structured Light
  • Nonlinear Optics

Background:

  • Developing interfaces between integrated photonics and free-space structured light is crucial for optical science and technology.
  • Anisotropic nonlinear susceptibility tensors in thin-film lithium niobate offer unique properties for light manipulation.

Purpose of the Study:

  • To construct nanophotonic chip-space interfaces for generating and engineering structured light.
  • To demonstrate reconfigurable and tunable generation of complex light states.

Main Methods:

  • Exploiting anisotropic nonlinear susceptibility in thin-film lithium niobate.
  • Utilizing nonlinear Čerenkov radiation in integrated nonlinear microring resonators.
  • Employing continuous-wave excitation for light generation.

Main Results:

  • Successfully generated and multidimensionally engineered structured light from on-chip waveguides.
  • Demonstrated tunable optical skyrmions via spin-orbit coupling.
  • Generated multistate integrated vortex microcombs using synergistic nonlinear optical processes (χ(2) and χ(3)).

Conclusions:

  • The developed platform bridges structured light and integrated nonlinear optics.
  • Offers new opportunities for on-chip spatiotemporal light generation and multidimensional nonlinear optics.
  • Highlights the potential of thin-film lithium niobate for advanced photonic applications.