首页|Acoustic Purcell effect induced by quasibound state in the continuum

Acoustic Purcell effect induced by quasibound state in the continuum

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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.

Acoustic Purcell effectBound state in the continuumMode couplingSound emission enhancementHigh-quality-factor acoustic device

Sibo Huang、Shuhuan Xie、He Gao、Tong Hao、Shuang Zhang、Tuo Liu、Yong Li、Jie Zhu

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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

College of Surveying and Geo-Informatics,Tongji University,Shanghai 200092,China

Department of Physics,The University of Hong Kong,Hong Kong 999077,China

Key Laboratory of Noise and Vibration Research,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China

The Hong Kong Polytechnic University Shenzhen Research Institute,Shenzhen 518057,China

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国家重点研发计划国家重点研发计划上海市科委项目上海市科委项目Research Grants Council of Hong Kong SARResearch Grants Council of Hong Kong SARResearch Grants Council of Hong Kong SAR

120742861177429721JC140560020ZR1460900AoE/P-502/2015205219C6013-18G

2024

10.1016/j.fmre.2022.06.009

自然科学基础研究(英文)

自然科学基础研究(英文)

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年,卷(期)：2024.(1)
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