Acoustic Purcell effect induced by quasibound state in the continuum

Sibo Huang ¹Shuhuan Xie ²He Gao ³Tong Hao ⁴Shuang Zhang ⁵Tuo Liu ⁶Yong Li ⁷Jie Zhu⁸

扫码查看

作者信息

1. Institute of Acoustics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China
2. Institute of Acoustics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China
3. Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China
4. College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China
5. Department of Physics,The University of Hong Kong,Hong Kong 999077,China
6. Key Laboratory of Noise and Vibration Research,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China
7. Institute of Acoustics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China
8. Institute of Acoustics,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China;The Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen 518057,China
折叠

Abstract

We study theoretically and experimentally the acoustic Purcell effect induced by quasi-bound states in the contin-uum(quasiBICs).A theoretical framework describing the acoustic Purcell effect of a resonant system is developed based on the system's radiative and dissipative factors,which reveals the critical emission condition for achieving optimum Purcell factors.We show that the quasiBICs contribute to highly confined acoustic field and bring about greatly enhanced acoustic emission,leading to strong Purcell effect.Our concept is demonstrated via two coupled resonators supporting a Friedrich-Wintgen quasiBIC,and the theoretical results are validated by the experiments observing emission enhancement of the sound source by nearly two orders of magnitude.Our work bridges the gap between the acoustic Purcell effect and acoustic BICs essential for enhanced wave-matter interaction and acoustic emission,which may contribute to the research of high-intensity sound sources,high-quality-factor acoustic devices and nonlinear acoustics.

Key words

Acoustic Purcell effect/Bound state in the continuum/Mode coupling/Sound emission enhancement/High-quality-factor acoustic device

引用本文复制引用

基金项目

国家重点研发计划(12074286)

国家重点研发计划(11774297)

上海市科委项目(21JC1405600)

上海市科委项目(20ZR1460900)

Research Grants Council of Hong Kong SAR(AoE/P-502/20)

Research Grants Council of Hong Kong SAR(15205219)

Research Grants Council of Hong Kong SAR(C6013-18G)

出版年

2024

自然科学基础研究(英文)

CSTPCD

ISSN：

参考文献量59

段落导航