Broadband Acoustic Purcell Effect from Collective Bound States in the Continuum

• DOI: 10.1002/advs.202414627
• Publication Date: 2025-02-21T11:46:22Z
• Authors: Sibo Huang; Shuhuan Xie; Tuo Liu; Tong Hao; Din Ping Tsai; Yong Li; Jie Zhu
• Keywords: Purcell effect

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 effect, substantially boosting sound exploring collective quasibound states in continuum (QBICs). A six‐cavity coupled system supporting five QBICs introduced, wherein all interact strongly with an source. takes advantage high quality factors and strong mode responses QBICs, leading substantial enhancement local density states. Consequently, considerable increase realized across frequency range 625–900 Hz. These findings provide insights into physical mechanisms driving systems open up promising avenues for development advanced devices.