Manipulation of acoustic wavefront by gradient metasurface based on Helmholtz Resonators

Liu, Jun; Li, Yifeng; Xu, Yongxiang; Liu, Xiaozhou

doi:10.1038/s41598-017-10781-5

Cited by 70 publications

(68 citation statements)

References 35 publications

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“…Reproduced under the terms of the Creative Commons CC‐BY license. [ 11 ] Copyright 2017, The Author(s), published by Springer Nature. b) Ultrathin sound diffuser with uniform angular distribution of acoustic intensity.…”

Section: Applications Of Acoustic Metamaterialsmentioning

confidence: 99%

“…Subsequently, negative effective acoustic parameters were observed in many other structures, including periodically arranged Helmholtz resonators, [7] membrane-type structures, [8] and coil-up space structures. To overcome these disadvantages and promote the development of AMs, several novel artificial structures with high refractive indices and double negative acoustic properties have been designed to manipulate and control transmitted and reflected waves through a variety of mechanisms such as asymmetric acoustic transmission, [9] cylindrical to plane wave conversion, [10,11] anomalous refraction/reflection, [12][13][14] acoustic self-bending, [15] using nondiffracting Bessel beams, [10,16] acoustic focusing, [17][18][19][20][21][22] and acoustic cloaking. [23] On the basis of theoretical research and structural design, the application of AMs in different fields has attracted considerable attention from researchers.…”

mentioning

confidence: 99%

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Acoustic Metamaterials: A Review of Theories, Structures, Fabrication Approaches, and Applications

Liao

Luan

Wang

et al. 2021

Adv Materials Technologies

131

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Acoustic metamaterials (AMs), which are materials composed of subwavelength periodic artificial structures with specific designs, have drawn significant research attention. This is because of the extraordinary abilities of AMs to manipulate acoustic waves compared with those of traditional acoustic materials. In this review, current advances in AM research are comprehensively investigated and summarized. First, major theories regarding AMs, including the acoustic wave equation, crystal lattice and energy band theory, effective medium theory, and general Snell's law, are explained in detail. Existing AM structures are then described and divided into several categories based on their structural characteristics and responses to acoustic waves. Furthermore, to bridge the gap between design and practical application, both conventional and advanced AM manufacturing methods are summarized. The applications of AMs in the fields of acoustic cloaking, acoustic lensing, acoustic absorption, noise reduction, and supernormal sound transmission are particularly delineated. Finally, contemporary challenges, trends, and strategies relevant to AMs are discussed. This review aims to provide a comprehensive collection of AM‐related knowledge, including information regarding physical theories, structures, fabrication approaches, and applications, which will help promote the further development of AMs.

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Section: Applications Of Acoustic Metamaterialsmentioning

confidence: 99%

mentioning

confidence: 99%

Acoustic Metamaterials: A Review of Theories, Structures, Fabrication Approaches, and Applications

Liao

Luan

Wang

et al. 2021

Adv Materials Technologies

131

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“…Due to their wide range of applications, including both industrial and medical, acoustic lenses are a hot topic among the scientific community. Nowadays, approaches to focus acoustic waves are mainly based on metasurfaces, which can be implemented with subwavelength slits [1], coiling-up space structures [2,3,4], or Helmholtz resonators [5]. Holographic structures have also been proposed as a flexible solution for synthesis of focusing profiles [6].…”

Section: Introductionmentioning

confidence: 99%

M-Bonacci Zone Plates for Ultrasound Focusing

Pérez-López¹,

Fuster²,

Candelas³

2019

Sensors

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In this work, we present a thorough analysis on M-bonacci zone plates for ultrasound focusing applications. These planar lenses are capable of providing bifocal focusing profiles with equal intensity in both foci and become very appealing for a wide range of scenarios including medical and industrial applications. We show that in high-wavelength domains, such as acoustics or microwaves, the separation between both foci can be finely adjusted at the expense of slightly increasing the distortion of the focusing profile, and we introduce a design parameter to deal with this issue and simplify the design process of these lenses. Experimental measurements are in good agreement with numerical simulations and demonstrate the potential of M-bonacci lenses in ultrasound focusing applications.

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“…Many researchers have successfully demonstrated the acoustic flat lenses using phononic crystals in a periodic fashion. Fascinating wave propagation phenomena such as single and double negative refraction [20,21], orthogonal wave transportation [7], non-diffracting Bessel beam [22], sub-wavelength scale wave focusing [22] and multiple wave scattering etc, were demonstrated by various periodic structures. Recently, a topologically optimized [23] twodimensional acoustic lens was successfully implemented in underwater imaging.…”

Section: Introductionmentioning

confidence: 99%

Multifunction acoustic modulation by a multi-mode acoustic metamaterial architecture

Ahmed

Indaleeb

et al. 2018

J. Phys. Commun.

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Exotic acoustical features, like acoustic transparency, ultrasonic beam focusing, acoustic band gap and super lensing capability using a single metamaterial architecture is unconventional and unprecedented in the literature, demonstrated herein. Conventional metamaterials can focus an ultrasonic beam at specific frequency which results into unwanted distortion of the output wave fields at neighboring sonic frequencies in the host medium. However, ultrasonic wave focusing by virtue of negative refraction and simultaneous transparency of the metamaterial at sonic frequencies are uncommon due to their frequency disparity. To circumvent this problem and to avoid the unwanted distortion of wave at sonic frequencies, metamaterial with an array of butterfly-shaped thin ring resonators are proposed to achieve the beam focusing at ultrasonic frequency (37.3 kHz) and keep the structure transparent to the sonic frequencies (<20 kHz). The butterfly metamaterial with local ring resonators or butterfly crystals (BC) were previously proposed to create wide band gaps (∼7 kHz) at ultrasonic frequencies above 20 kHz. However, in this study a unique sub-wavelength scale wave focusing capability of the butterfly metamaterial utilizing the negative refraction phenomenon is demonstrated, while keeping the metamaterial block transparent to the propagating wave at lower sonic frequencies below the previously reported bandgaps.

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Manipulation of acoustic wavefront by gradient metasurface based on Helmholtz Resonators

Cited by 70 publications

References 35 publications

Acoustic Metamaterials: A Review of Theories, Structures, Fabrication Approaches, and Applications

Acoustic Metamaterials: A Review of Theories, Structures, Fabrication Approaches, and Applications

M-Bonacci Zone Plates for Ultrasound Focusing

Multifunction acoustic modulation by a multi-mode acoustic metamaterial architecture

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