Interface state-based bound states in continuum and below-continuum-resonance modes with high-Q factors in the rotational periodic system

杨嘉玲 ¹史奥芊 ¹彭宇宸 ¹彭鹏 ¹刘建军²

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作者信息

1. Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education,School of Physics and Electronics,Hunan University,Changsha 410082,China
2. Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education,School of Physics and Electronics,Hunan University,Changsha 410082,China;Greater Bay Area Institute for Innovation,Hunan University,Guangzhou 511300,China
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Abstract

We have introduced a new approach to calculate the orbital angular momentum(OAM)of bound states in contin-uum(BICs)and below-continuum-resonance(BCR)modes in the rotational periodic system nested inside and outside by transforming the Bloch wave number from the translational periodic system.We extensively classify and study these BICs and BCR modes,which exhibit high-quality(high-Q)factors,in different regions relative to the interface of the system.These BICs and BCR modes with a high-Q factor have been studied in detail based on distinctive structural parameters and scattering theory.The outcomes of this research break the periodic limitation of interface state-based BICs,and realize more and higher symmetry interface state-based BICs and BCR modes.Moreover,we can control the region where light is captured by adjusting the frequency,and show that the Q factor of BICs is more closely related to the ordinal number of rings and the rotational symmetry number of the system.

Key words

bound states in the continuum/below continuum resonance modes/high-quality factors

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基金项目

National Natural Science Foundation of China(61405058)

National Natural Science Foundation of China(62075059)

Natural Science Foundation of Hunan Province(2017JJ2048)

Natural Science Foundation of Hunan Province(2020JJ4161)

Scientific Research Foundation of Hunan Provincial Education Department(21A0013)

Open Project of State Key Laboratory of Advanced Optical Communication Systems and Networks of China(2024GZKF20)

Guangdong Basic and Applied Basic Research Foundation(2024A1515011353)

出版年

2024

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

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