Topological states in the super-SSH model

The topological edge state distributes along the edge of a topological insulator which has advantages in prohibiting radiation and reflection in the evolution dynamics because of the topological protection property. The Su-Schrieffer-Heeger (SSH) model provides the simplest lattice configuration tha...

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Veröffentlicht in:Optics express 2021-12, Vol.29 (26), p.42827
Hauptverfasser: Zhang, Yiqi, Ren, Boquan, Li, Yongdong, Ye, Fangwei
Format: Artikel
Sprache:eng
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Zusammenfassung:The topological edge state distributes along the edge of a topological insulator which has advantages in prohibiting radiation and reflection in the evolution dynamics because of the topological protection property. The Su-Schrieffer-Heeger (SSH) model provides the simplest lattice configuration that supports topological edge states. Here, we investigate the properties of an extended SSH model – super-SSH model – with three sites in a unit cell for one-dimensional case and nine sites in a unit cell for two-dimensional case. Theoretical analysis and numerical simulation demonstrate that topological edge states and topological defect states are supported in the super-SSH model. This work extends the form of SSH model and may serve as a novel platform for developing photonic techniques based on topological phase transition.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.445301