Acoustic Bound States in the Continuum in Coupled Helmholtz Resonators
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914913567375360 |
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| author | Krasikova, Mariia Kronowetter, Felix Krasikov, Sergey Kuzmin, Mikhail Maeder, Marcus Yang, Tao Melnikov, Anton Marburg, Steffen Bogdanov, Andrey |
| author_facet | Krasikova, Mariia Kronowetter, Felix Krasikov, Sergey Kuzmin, Mikhail Maeder, Marcus Yang, Tao Melnikov, Anton Marburg, Steffen Bogdanov, Andrey |
| contents | Resonant states underlie a variety of metastructures that exhibit remarkable capabilities for effective control of acoustic waves at subwavelength scales. The development of metamaterials relies on the rigorous mode engineering providing the implementation of the desired properties. At the same time, the application of metamaterials is still limited as their building blocks are frequently characterized by complicated geometry and can't be tuned easily. In this work, we consider a simple system of coupled Helmholtz resonators and study their properties associated with the tuning of coupling strength and symmetry breaking. We numerically and experimentally demonstrate the excitation of quasi-bound state in the continuum in the resonators placed in a free space and in a rectangular cavity. It is also shown that tuning the intrinsic losses via introducing porous inserts can lead to spectral splitting or merging of quasi-\textit{bound states in the continuum} and occurrence of \textit{exceptional points}. The obtained results will open new opportunities for the development of simple and easy-tunable metastructures based on Helmholtz resonances. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_07383 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Acoustic Bound States in the Continuum in Coupled Helmholtz Resonators Krasikova, Mariia Kronowetter, Felix Krasikov, Sergey Kuzmin, Mikhail Maeder, Marcus Yang, Tao Melnikov, Anton Marburg, Steffen Bogdanov, Andrey Applied Physics Classical Physics Resonant states underlie a variety of metastructures that exhibit remarkable capabilities for effective control of acoustic waves at subwavelength scales. The development of metamaterials relies on the rigorous mode engineering providing the implementation of the desired properties. At the same time, the application of metamaterials is still limited as their building blocks are frequently characterized by complicated geometry and can't be tuned easily. In this work, we consider a simple system of coupled Helmholtz resonators and study their properties associated with the tuning of coupling strength and symmetry breaking. We numerically and experimentally demonstrate the excitation of quasi-bound state in the continuum in the resonators placed in a free space and in a rectangular cavity. It is also shown that tuning the intrinsic losses via introducing porous inserts can lead to spectral splitting or merging of quasi-\textit{bound states in the continuum} and occurrence of \textit{exceptional points}. The obtained results will open new opportunities for the development of simple and easy-tunable metastructures based on Helmholtz resonances. |
| title | Acoustic Bound States in the Continuum in Coupled Helmholtz Resonators |
| topic | Applied Physics Classical Physics |
| url | https://arxiv.org/abs/2405.07383 |