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

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 fin...

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Bibliographic Details
Published in:arXiv.org 2023-01
Main Authors: Arkhipova, A A, Kartashov, Y V, Ivanov, S K, Zhuravitskii, S A, Skryabin, N N, Dyakonov, I V, Kalinkin, A A, Kulik, S P, Kompanets, V O, Chekalin, S V, F Ye, Konotop, V V, Torner, L, Zadkov, V N
Format: Article
Language:English
Subjects:
Lattices
Localization
Nonlinearity
Solitary waves
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2301.02090