Coupled topological states in a non-Hermitian heterostructure based on the two-dimensional SSH model
Abstract
Topological mode coupling induces hybridized states with exotic phenomena. Introducing gain/loss into topological photonic systems (non-Hermitian framework) opens new physical dimensions. This work studies coupled topological edge/corner states based on the two-dimensional Su–Schrieffer–Heeger (SSH) model. It demonstrates topological phase transitions at gain–loss domain interfaces of topological photonic crystals (PCs) and investigates edge/corner states in loss–gain–loss structures. Numerical results show non-Hermitian topological states have better edge/corner localization than Hermitian ones. This advances non-Hermitian Dirac physics understanding and provides a platform for photonic device applications.
Fields of Study & Subjects
Quantum Mechanics and Non-Hermitian Physics
Topological Materials and Phenomena
Metamaterials and Metasurfaces Applications
Publication details
- Journal / source
- Journal of the Optical Society of America B
- Volume
- 43
- Issue
- 2
- Pages
- 328–328
- Publication date
- 13 January 2026
- Language
- EN