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Vortex light bullets in rotating Quasi-Phase-Matched photonic crystals with quadratic and cubic nonlinearity

Author

Listed:
  • Chen, Shunfang
  • Wang, Linjia
  • Fan, Zhuo
  • Peng, Wei
  • Wu, Di
  • Zhao, Yuan
  • Xu, Siliu

Abstract

We design a setup for generating stable vortex light bullets (LBs) in a rotating Quasi-Phase-Matched (QPM) photonic crystal, exhibiting competing quadratic and cubic nonlinearity. The photonic crystal is designed with a rotational checkerboard structure. Within this framework, three types of vortex LBs (square-, rhombus- and necklace-shaped) are observed, which are constructed as four-peak and eight-peak vortex modes, respectively. The dynamics of vortex LBs are controlled by system parameters, including the power, rotating frequency, size of checkerboard cells, and azimuthal indices of the incident light. In contrast to the stable two-dimensional vortex solitons observed in pure quadratic systems, the vortex LBs investigated in the competing quadratic and cubic nonlinear system can support vortex LBs with higher topological charges. Especially, the rotating frequency results in a transition of vortex LBs from a quadrupole to the traditional vortex modes.

Suggested Citation

  • Chen, Shunfang & Wang, Linjia & Fan, Zhuo & Peng, Wei & Wu, Di & Zhao, Yuan & Xu, Siliu, 2025. "Vortex light bullets in rotating Quasi-Phase-Matched photonic crystals with quadratic and cubic nonlinearity," Chaos, Solitons & Fractals, Elsevier, vol. 190(C).
    • Handle: RePEc:eee:chsofr:v:190:y:2025:i:c:s0960077924013298
    DOI: 10.1016/j.chaos.2024.115777
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