Valley edge states as bound states in the continuum

Shunda Yin ¹Liping Ye ¹Hailong He ¹Xueqin Huang ²Manzhu Ke ¹Weiyin Deng ¹Jiuyang Lu ¹Zhengyou Liu³

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作者信息

1. Key Laboratory of Artificial Micro-and Nanostructures of Ministry of Education,School of Physics and Technology,Wuhan University,Wuhan 430072,China
2. School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China
3. Key Laboratory of Artificial Micro-and Nanostructures of Ministry of Education,School of Physics and Technology,Wuhan University,Wuhan 430072,China;Institute for Advanced Studies,Wuhan University,Wuhan 430072,China
折叠

Abstract

Bound states in the continuum(BICs)are spatially localized states with energy embedded in the contin-uum spectrum of extended states.The combination of BICs physics and nontrivial band topology theory givs rise to topological BICs,which are robust against disorders and meanwhile,the merit of conventional BICs is attracting wide attention recently.Here,we report valley edge states as topological BICs,which appear at the domain wall between two distinct valley topological phases.The robustness of such BICs is demonstrated.The simulations and experiments show great agreement.Our findings of valley related topological BICs shed light on both BICs and valley physics,and may foster innovative applications of topological acoustic devices.

Key words

Topological BICs/Valley edge states/Phononic crystals/Topological insulators

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基金项目

National Key R&D Program of China(2022YFA1404500)

National Key R&D Program of China(2022YFA1404900)

National Natural Science Foundation of China(12074128)

National Natural Science Foundation of China(12004286)

National Natural Science Foundation of China(12104347)

National Natural Science Foundation of China(12222405)

National Natural Science Foundation of China(12374419)

National Natural Science Foundation of China(12374409)

Guangdong Basic and Applied Basic Research Foundation(2021B1515020086)

Guangdong Basic and Applied Basic Research Foundation(2022B1515020102)

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

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