Implementation of acoustic demultiplexing with membrane-type metasurface in low frequency range

Chen, Xing; Liu, Peng; Hou, Zewei; Pei, Yongmao

doi:10.1063/1.4981898

Cited by 39 publications

(20 citation statements)

References 28 publications

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“…Using frequency to control functionalities been demonstrated on acoustic metasurfaces designed for controlling reflected waves. [36][37][38] These metasurfaces consist of multiple Helmholtz resonant units, which are well-decoupled and merely work in the vicinity of their respective resonant frequencies. Therefore, independent control of phases at different frequencies can be realized.…”

Section: Introductionmentioning

confidence: 99%

Frequency‐Coded Passive Multifunctional Elastic Metasurfaces

Rong

Zhang

et al. 2020

Adv Funct Materials

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As an emerging material, metasurfaces open the door to a wide range of applications based on ultrasonic and elastic waves. However, most of the existing elastic metasurfaces have a fixed functionality and operate at a fixed frequency, which make them difficult to adapt to changing working requirements and/or environments. Although several recently proposed reconfigurable designs can relax this limitation, they either need laborious tuning or complex active control systems. In this work, by encoding multiple functionalities onto a single metasurface through operation frequencies, passive metasurfaces with switchable multifunctionalities are proposed and realized. Different wave manipulation functions of a single metasurface can be switched from one to another simply by changing the operation frequency. The design of these metasurfaces is realized using a systematic design approach based on topology optimization. Frequency-coded multiple elastic wave manipulation functions, including wave beam steering and focusing, are numerically and experimentally demonstrated. Good agreement between the numerical simulations and experimental measurements is achieved. The proposed design strategy significantly enhances the functionalities and adaptivity of metasurfaces, moving them closer towards real-world applications.

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Section: Introductionmentioning

confidence: 99%

Frequency‐Coded Passive Multifunctional Elastic Metasurfaces

Rong

Zhang

et al. 2020

Adv Funct Materials

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“…Comparing to membrane-type demultiplexing acoustic metasurface [15], the MAM designed based on HR arrays [4,8,[11][12][13][16][17][18][19][20] features simple structure and steady acoustic properties (amplitude and phase responses) which benefit for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional acoustic metasurface based on an array of Helmholtz resonators

2019

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We demonstrate multifunctional acoustic metasurfaces (MAMs) that can simultaneously realize the same functionality or multiple different functionalities at multiple tunable frequencies. The fundamental physical mechanism is based on designing supercell of Helmholtz resonators (HRs) with multiple resonances operating at different frequencies. We theoretically, numerically and experimentally demonstrate the achievement of multiple functionalities by the proposed designed metastructure, which produces extraordinary reflection at different angles and different acoustic focusing localizations under the same normal incidence. Our finding paves the way towards multifunctional compact acoustic devices and can lead to pragmatic contemporary applications such as multiple beam shaping, or functional device with special dispersion property.

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“…The membrane-type acoustic metasurfaces consisting of decorated membrane resonators of various forms have been widely studied 24 – 27 . However, almost all previous studies were focused on employing this structure to achieve robust impedance matching and perfect absorption.…”

Section: Introductionmentioning

confidence: 99%

Wavefront manipulation based on transmissive acoustic metasurface with membrane-type hybrid structure

Liu

Zhang

Liu

et al. 2018

Sci Rep

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We designed and demonstrated a gradient acoustic metasurface to manipulate the transmissive wavefront. The gradient metasurface is composed of eight elements based on membrane-type hybrid structures, whose thickness and width are about 1/5 and 1/20 of the incident wavelength, respectively. Here, we employ acoustic theory to analyze the transmission spectrum and phase gradient of the metasurface, the properties of high transmission efficiency and discrete phase shifts over the full range can be achieved simultaneously. By appropriate selection of the phase profile along the transverse coordinate of the metasurface or the angle of incident wave, the transmissive wavefront manipulations based on metasurface can be obtained as expected from the generalized Snell’s law, such as anomalous refraction, acoustic cloak based on flat focusing, acoustic self-bending beam, conversion of propagating wave to surface wave and negative refraction. Our gradient metasurface may have potential application in low-loss acoustic devices.

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Implementation of acoustic demultiplexing with membrane-type metasurface in low frequency range

Cited by 39 publications

References 28 publications

Frequency‐Coded Passive Multifunctional Elastic Metasurfaces

Frequency‐Coded Passive Multifunctional Elastic Metasurfaces

Multifunctional acoustic metasurface based on an array of Helmholtz resonators

Wavefront manipulation based on transmissive acoustic metasurface with membrane-type hybrid structure

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