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...
Gespeichert in:
Veröffentlicht in: | Optics express 2021-12, Vol.29 (26), p.42827 |
---|---|
Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
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 |