Acoustic perfect absorbers via spiral metasurfaces with embedded apertures
By Sibo Huang, Xinsheng Fang, Xu Wang, B. Assouar, Qian Cheng, Yong Li. Applied Physics Letters, 2018
210 citations recorded by the source corpus.
In this work, we analytically and experimentally present perfect acoustic absorbers via spiral metasurfaces composed of coiled channels and embedded apertures. Perfect absorption (reaching 0.999 in experiments) is realized with an ultra-thin thickness down to ∼1/100th of the operating wavelength. Owing to the superior impedance manipulation provided by the embedded apertures, perfect absorption with tunable frequencies is demonstrated. Our results would contribute to paving a way towards designing thin and light absorbers for the low frequency absorption challenge.In this work, we analytically and experimentally present perfect acoustic absorbers via spiral metasurfaces composed of coiled channels and embedded apertures. Perfect absorption (reaching 0.999 in experiments) is realized with an ultra-thin thickness down to ∼1/100th of the operating wavelength. Owing to the superior impedance manipulation provided by the embedded apertures, perfect absorption with tunable frequencies is demonstrated. Our results would contribute to paving a way towards designing thin and light absorbers for the low frequency absorption challenge.
Subfields: Biomedical Engineering, Electronic, Optical and Magnetic Materials, Speech and Hearing
View Paper: https://www.semanticscholar.org/paper/0aad6cb9a5ab52a46c431546490b22e7e8a291cd
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Citations in the corpus
- Extreme low-frequency ultrathin acoustic absorbing metasurface (2019, background): “We also would like to emphasize here, that the physical mechanism and the design of the reported absorbing metasurface are significantly different from the reported ones in our previous works [12, 24].”