Academic Journal
Topological gap solitons in equidistant lithium niobate waveguide arrays
| Τίτλος: | Topological gap solitons in equidistant lithium niobate waveguide arrays |
|---|---|
| Συγγραφείς: | Gorbach, Andrey V. |
| Πηγή: | Gorbach, A V 2025, 'Topological gap solitons in equidistant lithium niobate waveguide arrays', Fizika Nizkikh Temperatur, vol. 51, no. 6, pp. 820-828. https://doi.org/10.1063/10.0036751 |
| Publication Status: | Preprint |
| Στοιχεία εκδότη: | AIP Publishing, 2025. |
| Έτος έκδοσης: | 2025 |
| Θεματικοί όροι: | optical waveguide arrays, discrete solitons, FOS: Physical sciences, topological photonics, Pattern Formation and Solitons (nlin.PS), thin film lithium niobate, Nonlinear Sciences - Pattern Formation and Solitons, name=General Physics and Astronomy, Physics - Optics, Optics (physics.optics) |
| Περιγραφή: | Equidistant 1D arrays of thin film lithium niobate waveguides can exhibit non-trivial topology due to a specific interplay between inter- and intra-modal couplings of two families of guided modes [A. V. Gorbach et al., Opt. Lett.48, 1982 (2023)]. In this work, we analyze two-color spatial solitons, emerging due to χ2 nonlinear interactions between the modes of non-trivial topology in the fundamental harmonic field, and modes of trivial topology in the second harmonic field. We discuss solitons localized in the bulk of the array (bulk solitons), and at an edge of a finite-size array (edge solitons). The latter emerge due to the nonlinear interactions between a topological edge mode in the fundamental harmonic and bulk modes in the second harmonic. We reveal that for each type of soliton, bulk or edge, there generally exist two families of solutions with different internal structures and ranges of propagation constants. All bulk solitons can only be excited above a certain power threshold dictated by the coupling strength in the second harmonic field and the phase matching between the fundamental and second harmonics. The power threshold for edge solitons generally appears to be much lower, and, by tuning the phase matching, it can be reduced to zero. |
| Τύπος εγγράφου: | Article |
| Περιγραφή αρχείου: | application/pdf |
| Γλώσσα: | English |
| ISSN: | 1090-6517 1063-777X |
| DOI: | 10.1063/10.0036751 |
| DOI: | 10.48550/arxiv.2412.20991 |
| Σύνδεσμος πρόσβασης: | http://arxiv.org/abs/2412.20991 https://purehost.bath.ac.uk/ws/files/366033803/LTP25-RE-00082.pdf |
| Rights: | CC BY |
| Αριθμός Καταχώρησης: | edsair.doi.dedup.....04d12d155b04e17d0a66ed9ecfcd6a16 |
| Βάση Δεδομένων: | OpenAIRE |
| ISSN: | 10906517 1063777X |
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| DOI: | 10.1063/10.0036751 |