Realization of dual-band topological states in Su-Schrieffer-Heeger-like photonic crystal slabs

被引：4

作者：

Chen, Ying ^{[1
]}

Zheng, Ze-Huan ^{[2
]}

Wang, Hai-Xiao ^{[3
]}

Wu, Feng ^{[4
]}

Chen, Huanyang ^{[5
]}

机构：

[1] Huaqiao Univ, Coll Informat Sci & Engn, Dept Phys, Xiamen 361021, Peoples R China

[2] Xiamen Inst Technol, Sch Comp Sci & Informat Engn, Xiamen 361021, Peoples R China

[3] Guangxi Normal Univ, Sch Phys Sci & Technol, Guilin 541004, Peoples R China

[4] Guangdong Polytech Normal Univ, Sch Optoelect Engn, Guangzhou 510665, Peoples R China

[5] Xiamen Univ, Coll Phys Sci & Technol, Dept Phys, Xiamen 361005, Peoples R China

来源：

RESULTS IN PHYSICS | 2023年 / 50卷

基金：

中国国家自然科学基金;

关键词：

Dual; -band; Topological edge states; Photonic crystal slabs;

D O I：

10.1016/j.rinp.2023.106589

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We design the bilayer mirror-symmetric (I-shaped) photonic crystal slabs supporting dual-band topological edge states simultaneously, which is confirmed by the topological phases and localized field distributions. By adjusting the coupling strengths at different positions of the I-shaped structure, the band structures can display different topology in different frequency bands, and the dual-band or single-band edge states can emerge flexibly at two or one band gaps, thus enabling high performance in manipulating topological states. Moreover, we also investigate the influence of broken mirror-symmetry Mz on the dual-band states. The study provides a promising way to realize multiband topological states and improve the efficiency of robust light transport.

引用

页数：8

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