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arXiv · 2408.09086

Composite solitary vortices of three-wave mixing in quasi-phase-matched photonic crystals

Chao Kong·Jinqing Li·Xinyi Tang·Xuli Li·Ju Jiao·Jun Cao·Haiming Deng
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Abstract

We report the composite vortex solitons of three-wave mixing propagate stably in a three-dimensional (3D) quasi-phase-matched photonic crystals (QPM-PhC). The modulation of QPM-PhC is designed as a checkerboard pattern. The vortex solitons, composed by three waves ($ω_{1,2,3}$) propagating through the lattices, exhibit a four-spotted discrete type, which gives rise to four distinct modes: zero-vorticity, vortex, anti-vortex, and quadrupole. The composite vortex solitons result from combinations of these modes and lead to four cases: vortex doubling, hidden vortices, vortex up-conversion, and anti-vortex up-conversion. Our findings indicate that all solitons can propagate stably through the crystals for 10 centimeters; however, only the vortex-doubling case remains stable over longer distances. This work enhances the understanding of vortex beam manipulation within 3D QPM-PhCs.

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Chao Kong, Jinqing Li, Xinyi Tang, Xuli Li, Ju Jiao, Jun Cao, Haiming Deng. 2024-08-17. Composite solitary vortices of three-wave mixing in quasi-phase-matched photonic crystals. https://arxiv.org/abs/2408.09086

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