Work

Solitons in composite linear–nonlinear moiré lattices

Year: 2024

Type: article

Abstract: 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.

Source: Optics Letters

DOI: 10.1364/ol.546501

Authors: Liangwei Zeng, Boris A. Malomed, Dumitru Mihalache, Jingzhen Li, Xing Zhu

Institutions: Shenzhen University, Tel Aviv University, University of Tarapacá, Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering

Language: English

Topic: Nonlinear Photonic Systems

Subfield: Statistical and Nonlinear Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: National Natural Science Foundation of China, Israel Science Foundation, Basic and Applied Basic Research Foundation of Guangdong Province

Awards: G3746375970, G633236830, G6528987614, G7536043322