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Updated: May 11, 2025

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities
Published on: November 30, 2012
Vortex solitons in quasi-phase-matched photonic crystals with competing quadratic and cubic nonlinearity
Zhuo Fan1, Wan Liu1, Linjia Wang1
1Hubei University of Science and Technology, Hubei University of Science and Technology, Key Laboratory of Optoelectronic Sensing and Intelligent Control, Xianning 437100, China and School of Biomedical Engineering and Imaging, Xianning Medical College, Xianning 437100, China.
Abstract:
We introduce a methodology for investigating vortex solitons (VSs) within quasi-phase-matched (QPM) photonic crystals, featuring competing quadratic and cubic nonlinearities. The photonic crystal is introduced with a checkerboard structure, which is feasible through contemporary technological advancements. The VS family is constructed as quadrupole and 8-pole configurations, with the quadrupole solitons displaying rhombus and square modes depending on different phase-matching conditions. Notably, an intriguing transformation from the quadrupole to the 8-pole configuration can be achieved by modulating the cubic nonlinear coefficient. Additionally, the square-shaped VSs would transfer to rhombus patterns by adjusting the power and size of the checkerboard cell in the framework of cubic nonlinearity. This work presents a versatile and powerful tool for exploring and manipulating vortex solitons in QPM photonic structures, with potential applications in optical signal processing, optical communications, and nonlinear optics research.
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