Multifrequency Solitons in Commensurate-Incommensurate Photonic Moiré Lattices

Yaroslav V. Kartashov, Fangwei Ye, Vladimir V. Konotop, and Lluis Torner
Phys. Rev. Lett. 127, 163902 – Published 15 October 2021

Abstract

We predict that photonic moiré patterns created by two mutually twisted periodic sublattices in quadratic nonlinear media allow the formation of parametric solitons under conditions that are strongly impacted by the geometry of the pattern. The question addressed here is how the geometry affects the joint trapping of multiple parametrically coupled waves into a single soliton state. We show that above the localization-delocalization transition the threshold power for soliton excitation is drastically reduced relative to uniform media. Also, the geometry of the moiré pattern shifts the condition for phase matching between the waves to the value that matches the edges of the eigenmode bands, thereby shifting the properties of all soliton families. Moreover, the phase-mismatch bandwidth for soliton generation is dramatically broadened in the moiré patterns relative to latticeless structures.

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  • Received 23 May 2021
  • Accepted 20 September 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.163902

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Yaroslav V. Kartashov1,2, Fangwei Ye3, Vladimir V. Konotop4, and Lluis Torner1,5

  • 1ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
  • 2Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow 108840, Russia
  • 3School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
  • 4Departamento de Física and Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Edifício C8, Campo Grande, Lisboa 1749-016, Portugal
  • 5Universitat Politecnica de Catalunya, 08034 Barcelona, Spain

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Issue

Vol. 127, Iss. 16 — 15 October 2021

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