Multiband topological states in the Penrose-triangle photonic crystals

The topological edge state (TES) and topological corner state (TCS) in photonic crystals (PCs) provide effective ways to manipulate the propagation of light. To improve the performance and integration of topological photonic devices, the realization of multiband topological states by PCs combined wi...

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Bibliographic Details
Published in:Optics letters 2023-01, Vol.48 (1), p.101-104
Main Authors: Xu, Qingxi, Peng, Yuchen, Yan, Bei, Shi, Aoqian, Peng, Peng, Xie, Jianlan, Liu, Jianjun
Format: Article
Language:English
Subjects:
Banded structure
Crystal lattices
Frequencies
Performance enhancement
Periodic structures
Photonic crystals
Topology
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Summary:The topological edge state (TES) and topological corner state (TCS) in photonic crystals (PCs) provide effective ways to manipulate the propagation of light. To improve the performance and integration of topological photonic devices, the realization of multiband topological states by PCs combined with quasi-periodic structure needs to be urgently explored. In this Letter, a Penrose-triangle (P-T) PC, which arranges the basic structural unit of a 12-fold Penrose-type photonic quasi-crystal (PQC) in a triangular lattice, is proposed. The TES and TCS at low- and high-frequency bands can be generated in the same structure, accompanied by the realization of three groups of TCSs. This will provide a new structure for the generation of TESs and TCSs in PCs, and will provide a new way to improve the performance and integration of topological photonic devices.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.477077