Bragg solitons in topological Floquet insulators

Bragg solitons in topological Floquet insulators

We consider a topological Floquet insulator consisting of two honeycomb arrays of identical waveguides having opposite helicities. The interface between the arrays supports two distinct topological edge states, which can be resonantly coupled by additional weak longitudinal refractive index modulati...

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Veröffentlicht in:Optics letters 2020-04, Vol.45 (8), p.2271-2274
Hauptverfasser: Ivanov, S. K., Kartashov, Y., Maczewsky, L. J., Szameit, A., Konotop, V. V.
Format: Artikel
Sprache:eng
Schlagworte:
Arrays
Insulators
Optics
Physical Sciences
Refractivity
Science & Technology
Solitary waves
Topology
Waveguides
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Zusammenfassung:We consider a topological Floquet insulator consisting of two honeycomb arrays of identical waveguides having opposite helicities. The interface between the arrays supports two distinct topological edge states, which can be resonantly coupled by additional weak longitudinal refractive index modulation with a period larger than the helix period. In the presence of Kerr nonlinearity, such coupled edge states enable topological Bragg solitons. Theory and examples of such solitons are presented. (C) 2020 Optical Society of America
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.390694