2021/04/06 by Ilya Deriy, Ivan Toftul, Mihail Petrov +1 · 105 citations
Engineering · Mathematics · Physics and Astronomy · #Acoustic Wave Resonator Technologies #Acoustics #Bound state #Fano plane #Fano resonance #Geometry #Mathematics #Mechanical and Optical Resonators #Multipole expansion #Optics #Physics #Plasmon #Quantum mechanics #Resonator #Scattering #Symmetry (geometry) #Topological Materials and Phenomena #physics.class-ph
paper · pdf · doi:10.1103/physrevlett.128.084301
published in Physical Review Letters 128(8), 084301 (American Physical Society) · 14 pages, 5 figures
arxiv created 2021/04/06 · openalex publication_date 2022/02/23 · arxiv updated 2022/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We reveal that finite-size solid acoustic resonators can support genuine bound states in the continuum (BICs) completely localized inside the resonator. The developed theory provides the multipole classification of such BICs in the resonators of various shapes. It is shown how breaking of the resonator's symmetry turns BICs into quasi-BICs manifesting themselves in the scattering spectra as high-Q Fano resonances. We believe that the revealed novel states will push the performance limits of acoustic devices and will serve as high-Q building blocks for acoustic sensors, antennas, and topological acoustic structures.