Observation of linear and nonlinear light localization at the edges of moiré lattices

Abstract

We observe linear and nonlinear light localization at the edges and in the corners of truncated moiré lattices created by the superposition of periodic mutually-twisted at Pythagorean angles square sublattices. Experimentally exciting corner linear modes in the fs-laser written moiré lattices we find drastic differences in their localization properties in comparison with the bulk excitations. We also address the impact of nonlinearity on the corner and bulk modes and experimentally observe the crossover from linear quasi-localized states to the surface solitons emerging at the higher input powers. Our results constitute the first experimental demonstration of localization phenomena induced by truncation of periodic moiré structures in photonic systems.

5 pages, 4 figures, to appear in Physical Review Letters

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• Band structure and topological property of twisted double bilayer graphenes
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Cited by in corpus (7)

• Vortex solitons in moire optical lattices
• Twist-tunable moiré optical resonances
• Floquet edge solitons in modulated trimer waveguide arrays
• Emergent spin and orbital angular momentum of light in twisted photonic bilayer
• Light gap bullets in defocusing media with optical lattices
• Self-consistent tensor network method for correlated super-moiré matter beyond one billion sites
• Bloch-Landau-Zener Oscillations in Moiré Lattices