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 and Haiming Deng

Chaos, Solitons & Fractals, 2024, vol. 187, issue C

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 (ω1,2,3) 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.

Keywords: Composite vortex solitons; Quasi-phase-matched photonic crystal; Three-wave mixing (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:187:y:2024:i:c:s096007792400910x

DOI: 10.1016/j.chaos.2024.115358

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