Robust topological edge states from one-dimensional diatomic chain photonic crystals

被引：3
|
作者：
Fang, Yun-Tuan [1 ,2 ]
Li, Xiao-Xue [1 ,2 ]
Yang, Li-Xia [1 ,2 ]
机构：
[1] Anhui Univ, Minist Educ, Key Lab Intelligent Comp & Signal Proc, Hefei 230039, Peoples R China
[2] Jiangsu Univ, Sch Comp Sci & Telecommun Engn, Zhenjiang 212013, Jiangsu, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2021年 / 35卷 / 10期
关键词：
One-dimensional diatomic chain photonic crystal; Zak phase; topological edge state; MODES; PHASE;
D O I：
10.1142/S0217979221501460
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
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页数：11
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