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

Shunfang Chen, Linjia Wang, Zhuo Fan, Wei Peng, Di Wu, Yuan Zhao and Siliu Xu

Chaos, Solitons & Fractals, 2025, vol. 190, issue C

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.

Keywords: Vortex light bullets; Rotating Quasi-Phase-Matched photonic crystal; Competing quadratic and cubic nonlinearity (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:190:y:2025:i:c:s0960077924013298

DOI: 10.1016/j.chaos.2024.115777

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