Realization of one-dimensional 2n-root topological states in photonic lattices

WEI RuiShan ¹ZHANG QingLong ¹YANG DanDan ¹HUANG XiongJian ¹PAN QiWen ¹KANG Juan ¹QIU JianRong ²YANG ZhongMin ³DONG GuoPing¹

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作者信息

1. State Key Laboratory of Luminescent Materials and Devices,and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices,School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China
2. State Key Laboratory of Modem Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,China
3. State Key Laboratory of Luminescent Materials and Devices,and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques,Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices,School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China;School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China
折叠

Abstract

Square-root topological insulators recently discovered are intriguing topological phases.They possess topological properties inherited from the squared Hamiltonian and exhibit double-band structures.The mechanism of the square root was generalized to 2n-root topological insulators,giving rise to more band gaps.In this study,we describe the experimental realization of one-dimensional 2n-root topological insulators in photonic waveguide arrays using the archetypical Su-Schrieffer-Heeger(SSH)model.Topological edge states with tunable numbers are clearly observed under visible light.In particular,we visualized the dynamic evolutions of the light propagation by varying the sample lengths,which further proved the localization and multiple numbers of edge states in 2n-root topological systems.The experiment,which involves constructing 2n-root topological photonic lattices in various geometric arrangements,provides a stable platform for studying topological states that exhibit a remarkable degree of flexibility and control.

Key words

2n-root topological insulators/multiple edge states/photonic waveguide arrays/light dynamics

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基金项目

Key R&D Program of Guangzhou(202007020003)

Guangzhou Basic and Applied Basic Research(202201010407)

Guangzhou Basic and Applied Basic Research(202201010428)

Basic and Applied Basic Research Foundation of Guangdong Province(2021A1515110475)

Basic and Applied Basic Research Foundation of Guangdong Province(2022A1515011289)

Basic and Applied Basic Research Foundation of Guangdong Province(2023A1515012666)

National Natural Science Foundation of China(62122027)

National Natural Science Foundation of China(52002128)

National Natural Science Foundation of China(62075063)

National Natural Science Foundation of China(51772101)

National Natural Science Foundation of China(51872095)

National Natural Science Foundation of China(12204179)

National Natural Science Foundation of China(52202004)

出版年

2024

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDEI

影响因子：1.056

ISSN：1674-7321

参考文献量42

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