Solitons in composite linear-nonlinear moiré lattices
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866909392721412096 |
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| author | Zeng, Liangwei Malomed, Boris A. Mihalache, Dumitru Li, Jingzhen Zhu, Xing |
| author_facet | Zeng, Liangwei Malomed, Boris A. Mihalache, Dumitru Li, Jingzhen Zhu, Xing |
| contents | We produce families of two-dimensional gap solitons (GSs) maintained by moiré lattices (MLs) composed of linear and nonlinear sublattices, with the defocusing sign of the nonlinearity. Depending on the angle between the sublattices, the ML may be quasiperiodic or periodic, composed of mutually incommensurate or commensurate sublattices, respectively (in the latter case, the inter-lattice angle corresponds to Pythagorean triples). The GSs include fundamental, quadrupole, and octupole solitons, as well as quadrupoles and octupoles carrying unitary vorticity. Stability segments of the GS families are identified by means of the linearized equation for small perturbations, and confirmed by direct simulations of perturbed evolution. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_10667 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Solitons in composite linear-nonlinear moiré lattices Zeng, Liangwei Malomed, Boris A. Mihalache, Dumitru Li, Jingzhen Zhu, Xing Optics Pattern Formation and Solitons We produce families of two-dimensional gap solitons (GSs) maintained by moiré lattices (MLs) composed of linear and nonlinear sublattices, with the defocusing sign of the nonlinearity. Depending on the angle between the sublattices, the ML may be quasiperiodic or periodic, composed of mutually incommensurate or commensurate sublattices, respectively (in the latter case, the inter-lattice angle corresponds to Pythagorean triples). The GSs include fundamental, quadrupole, and octupole solitons, as well as quadrupoles and octupoles carrying unitary vorticity. Stability segments of the GS families are identified by means of the linearized equation for small perturbations, and confirmed by direct simulations of perturbed evolution. |
| title | Solitons in composite linear-nonlinear moiré lattices |
| topic | Optics Pattern Formation and Solitons |
| url | https://arxiv.org/abs/2411.10667 |