π-solitons on a ring of waveguides

Sergey K. Ivanov and Yaroslav V. Kartashov

Chaos, Solitons & Fractals, 2023, vol. 174, issue C

Abstract: We study the existence and stability of π-solitons on a ring of periodically oscillating waveguides. The array is arranged into Su–Schrieffer–Heeger structure placed on a ring, with additional spacing between two ends of the array. Due to longitudinal oscillations of waveguides, this Floquet structure spends half of the longitudinal period in topological phase, while on the other half it is nontopological. Nevertheless, waveguide oscillations lead to the emergence of anomalous topological π-modes at both ends of the structure that strongly couple in our ring geometry, leading to the formation of previously unexplored in-phase and out-of-phase π-modes. We study topological solitons bifurcating from such linear π-modes and demonstrate how their properties and stability depend on the size of the ring and on spacing between two ends of the array.

Keywords: Solitons; Topological insulator; Floquet system; π-modes; Waveguides array (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:chsofr:v:174:y:2023:i:c:s0960077923007671

DOI: 10.1016/j.chaos.2023.113866

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