AI Article Synopsis
- The ability to confine sound energy with high resonance quality factors is crucial for advanced acoustic devices used in biological ultrasonics and high-resolution sensing.
- Structures previously developed showed limited quality factors, but new bound states in the continuum (BIC) can enable high-quality acoustic modes.
- The research outlines a theoretical and experimental approach demonstrating a single open resonator that can support different types of BICs, achieving quality factors significantly higher than previously recorded in open resonators.
Article Abstract
The ability of sound energy confinement with high-quality factor resonance is of vital importance for acoustic devices requiring high intensity and hypersensitivity in biological ultrasonics, enhanced collimated sound emission (i.e. sound laser) and high-resolution sensing. However, structures reported so far have been experimentally demonstrated with a limited quality factor of acoustic resonances, up to several tens in an open resonator. The emergence of bound states in the continuum makes it possible to realize high quality factor acoustic modes. Here, we report the theoretical design and experimental demonstration of acoustic bound states in the continuum supported by a single open resonator. We predicted that such an open acoustic resonator could simultaneously support three types of bound states in the continuum, including symmetry protected bound states in the continuum, Friedrich-Wintgen bound states in the continuum induced by mode interference, as well as a new type-mirror symmetry induced bound states in the continuum. We also experimentally demonstrated their existence with quality factor up to one order of magnitude greater than the highest quality factor reported in an open resonator.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8355331 | PMC |
| http://dx.doi.org/10.1038/s41467-021-25130-4 | DOI Listing |
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