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- Title
Robust topological edge states from one-dimensional diatomic chain photonic crystals.
- Authors
Fang, Yun-Tuan; Li, Xiao-Xue; Yang, Li-Xia
- Abstract
The Su–Schrieffer–Heeger (SSH) model can occur in a one-dimensional (1D) diatomic chain photonic crystal (PC) in which a unit cell includes two same slabs (atoms). With different intervals of the two slabs, the two combined 1D PCs can support topological edge states in all photonic boundary bandgaps. These topological edge states come from the inversion of topological phase of the bands through the band folding effect. When the sum of the two atom intervals in the two different 1D PCs equals to the unit cell length, these edge state frequencies keep invariant.
- Subjects
PHOTONIC crystals; UNIT cell; EDGES (Geometry)
- Publication
International Journal of Modern Physics B: Condensed Matter Physics; Statistical Physics; Applied Physics, 2021, Vol 35, Issue 10, pN.PAG
- ISSN
0217-9792
- Publication type
Article
- DOI
10.1142/S0217979221501460