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

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外文摘要：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.

外文关键词：

2n-root topological insulatorsmultiple edge statesphotonic waveguide arrayslight dynamics

作者：

WEI RuiShan、ZHANG QingLong、YANG DanDan、HUANG XiongJian、PAN QiWen、KANG Juan、QIU JianRong、YANG ZhongMin、DONG GuoPing

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作者单位：

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

State Key Laboratory of Modem Optical Instrumentation,College of Optical Science and Engineering,Zhejiang University,Hangzhou 310027,China

School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China

基金：

Key R&D Program of GuangzhouGuangzhou Basic and Applied Basic ResearchGuangzhou Basic and Applied Basic ResearchBasic and Applied Basic Research Foundation of Guangdong ProvinceBasic and Applied Basic Research Foundation of Guangdong ProvinceBasic and Applied Basic Research Foundation of Guangdong ProvinceNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China

项目编号：

2020070200032022010104072022010104282021A15151104752022A15150112892023A151501266662122027520021286207506351772101518720951220417952202004

出版年：

2024

DOI：

10.1007/s11431-022-2347-4

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

年,卷(期)：2024.67(1)

参考文献量42