Broadband Acoustic Purcell Eﬀect from Collective Bound States in the Continuum

Sibo Huang; Shuhuan Xie; Tuo Liu; Tong Hao; Din Ping Tsai; Yong Li; Jie Zhu

doi:10.1002/advs.202414627

Broadband Acoustic Purcell Eﬀect from Collective Bound States in the Continuum

Sibo Huang
, Shuhuan Xie
, Tuo Liu
, Tong Hao
, Din Ping Tsai^*
, Yong Li^*
, Jie Zhu^*

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

9 Citations (Scopus)

26 Downloads (CityUHK Scholars)

Abstract

The Purcell effect significantly improves the performance of various emission devices but is typically constrained by a narrow operational bandwidth due to inherent resonant mechanisms. This study achieves broadband acoustic Purcell effect, substantially boosting sound emission by exploring collective quasibound states in the continuum (QBICs). A six-cavity coupled system supporting five QBICs is introduced, wherein all of the QBICs interact strongly with an acoustic source. This system takes advantage of the high quality factors and the strong mode responses of the collective QBICs, leading to a substantial enhancement of the local density of states. Consequently, a considerable increase in sound emission is realized across the frequency range of 625–900 Hz. These findings provide insights into the physical mechanisms driving the broadband Purcell effect in resonant systems and open up promising avenues for the development of advanced acoustic emission devices.

© 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH

Original language	English
Article number	2414627
Number of pages	8
Journal	Advanced Science
Volume	12
Issue number	15
Online published	21 Feb 2025
DOIs	https://doi.org/10.1002/advs.202414627
Publication status	Published - 17 Apr 2025

Funding

This work was supported by the University Grants Committee/Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. AoE/P-502/20, CRF Project: C5031-22G, GRF Project: CityU15303521; CityU11305223; CityU11300224), the City University of Hong Kong (Project Nos. 9380131, and 7005867), and the National Natural Science Foundation of China (Project Nos. 62375232, and 92263208), the Science and Technology Commission of Shanghai Municipality (Project No. 22JC1404100), the Shanghai Pilot Program for Basic Research, and the Xiaomi Young Talents Program. Open Access made possible with partial support from the Open Access Publishing Fund of the City University of Hong Kong.

Research Keywords

bound states in the continuum
broadband acoustic Purcell eﬀect
collec-tive mode responses
emission-enhancement materials
symmetry-relatedmodulation

Publisher's Copyright Statement

This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

RGC Funding Information

RGC-funded

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10.1002/advs.202414627

271295479.pdfFinal Published version, 1.59 MBLicence: CC BY

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title = "Broadband Acoustic Purcell Eﬀect from Collective Bound States in the Continuum",

abstract = "The Purcell effect significantly improves the performance of various emission devices but is typically constrained by a narrow operational bandwidth due to inherent resonant mechanisms. This study achieves broadband acoustic Purcell effect, substantially boosting sound emission by exploring collective quasibound states in the continuum (QBICs). A six-cavity coupled system supporting five QBICs is introduced, wherein all of the QBICs interact strongly with an acoustic source. This system takes advantage of the high quality factors and the strong mode responses of the collective QBICs, leading to a substantial enhancement of the local density of states. Consequently, a considerable increase in sound emission is realized across the frequency range of 625–900 Hz. These findings provide insights into the physical mechanisms driving the broadband Purcell effect in resonant systems and open up promising avenues for the development of advanced acoustic emission devices. {\textcopyright} 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH",

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author = "Sibo Huang and Shuhuan Xie and Tuo Liu and Tong Hao and Tsai, \{Din Ping\} and Yong Li and Jie Zhu",

year = "2025",

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AU - Huang, Sibo

AU - Xie, Shuhuan

AU - Liu, Tuo

AU - Hao, Tong

AU - Tsai, Din Ping

AU - Li, Yong

AU - Zhu, Jie

PY - 2025/4/17

Y1 - 2025/4/17

N2 - The Purcell effect significantly improves the performance of various emission devices but is typically constrained by a narrow operational bandwidth due to inherent resonant mechanisms. This study achieves broadband acoustic Purcell effect, substantially boosting sound emission by exploring collective quasibound states in the continuum (QBICs). A six-cavity coupled system supporting five QBICs is introduced, wherein all of the QBICs interact strongly with an acoustic source. This system takes advantage of the high quality factors and the strong mode responses of the collective QBICs, leading to a substantial enhancement of the local density of states. Consequently, a considerable increase in sound emission is realized across the frequency range of 625–900 Hz. These findings provide insights into the physical mechanisms driving the broadband Purcell effect in resonant systems and open up promising avenues for the development of advanced acoustic emission devices. © 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH

AB - The Purcell effect significantly improves the performance of various emission devices but is typically constrained by a narrow operational bandwidth due to inherent resonant mechanisms. This study achieves broadband acoustic Purcell effect, substantially boosting sound emission by exploring collective quasibound states in the continuum (QBICs). A six-cavity coupled system supporting five QBICs is introduced, wherein all of the QBICs interact strongly with an acoustic source. This system takes advantage of the high quality factors and the strong mode responses of the collective QBICs, leading to a substantial enhancement of the local density of states. Consequently, a considerable increase in sound emission is realized across the frequency range of 625–900 Hz. These findings provide insights into the physical mechanisms driving the broadband Purcell effect in resonant systems and open up promising avenues for the development of advanced acoustic emission devices. © 2025 The Author(s). Advanced Science published by Wiley-VCH GmbH

KW - bound states in the continuum

KW - broadband acoustic Purcell eﬀect

KW - collec-tive mode responses

KW - emission-enhancement materials

KW - symmetry-relatedmodulation

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Broadband Acoustic Purcell Eﬀect from Collective Bound States in the Continuum

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

Access Output

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GRF: High-Q Plasmonic Metasurfaces with Angular Stability Empowered by a Flat Band

CRF-ExtU-Lead: Smart Self-adaptive Shearing Interferometry for Wavefront Optical Characterization

AoE(UGC): Meta-optics, Meta-acoustics and Meta-device

Cite this

Broadband Acoustic Purcell Eﬀect from Collective Bound States in the Continuum

Abstract

Funding

Research Keywords

Publisher's Copyright Statement

RGC Funding Information

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Projects

GRF: High-Q Plasmonic Metasurfaces with Angular Stability Empowered by a Flat Band

CRF-ExtU-Lead: Smart Self-adaptive Shearing Interferometry for Wavefront Optical Characterization

AoE(UGC): Meta-optics, Meta-acoustics and Meta-device

Cite this