Acoustic focusing and imaging via phononic crystal and acoustic metamaterials

Ma, Fuyin; Huang, Zhifu; Liu, Chongrui; Wu, Jiu Hui

doi:10.1063/5.0074503

Cited by 72 publications

(19 citation statements)

References 178 publications

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“…It is necessary to conduct in-depth exploration of the compilation and design rules of mechanical computing to integrate the sensing, computing and actuating functions of the automatous systems. The concepts presented here have potential applications in a wide range of elds utilizing phononic crystals, such as MEMS 50 , aerospace 51 , thermal physics 52 , optomechanics 53 , biomedical imaging 54 , and more.…”

Section: Discussionmentioning

confidence: 99%

Self-powered non-reciprocal phononic logic gates

Zhang

Tan

Wang

et al. 2022

Preprint

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Mechanical computing provides an information processing method adapting and interacting with the environment via living materials. As in electronic computing, power supply in mechanical computing is still the challenge. Designing self-powered logic gates can expand application scenarios of mechanical computing for environmental interaction. Here we formulate a framework of self-powered phononic logic gates as the basis for mechanical computing of the integrated acoustic circuit. Via tuning non-reciprocal bands, resonant band and obstacle band of a topologically imbalanced graded phononic crystal that breaks the spatial inversion symmetry, complete seven Boolean logic gates are realized on one metamaterial. The input of the logic gate, Lamb wave, is converted to the electric signal as the self-powered output by combination of the superior evanescent effect of the defect mode and the positive piezoelectric effect. An exemplify real-time heart rate monitoring powered by the graded phononic crystal is demonstrated for high-density energy conversion. The self-powered non-reciprocal phononic logic gates can be implemented on any length scale and broad external conditions.

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Section: Discussionmentioning

confidence: 99%

Self-powered non-reciprocal phononic logic gates

Zhang

Tan

Wang

et al. 2022

Preprint

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“…When the frequency of the elastic wave propagating in the local resonance element is close to its resonance frequency, the local resonance element will resonate under the action of the vibration energy of the elastic wave. Resonance will absorb vibration energy, so that elastic waves cannot continue to propagate forward and form band gap [11][12][13][14][15].…”

Section: Piezoelectric Metamaterialsmentioning

confidence: 99%

A review of piezoelectric metamaterials for underwater equipment

Zhao

Wu³

et al. 2022

Front. Phys.

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As an important tool for monitoring the marine environment, safeguarding maritime rights and interests and building a smart ocean, underwater equipment has developed rapidly in recent years. Due to the problems of seawater corrosion, excessive deep-sea static pressure and noise interference in the marine environment and economy, the applicability of manufacturing materials must be considered at the beginning of the design of underwater equipment. Piezoelectric metamaterial is widely used in underwater equipment instead of traditional materials because the traditional materials can not meet the application requirements. In this paper, according to the application range of piezoelectric metamaterials in underwater equipment, the current application of piezoelectric metamaterials is reviewed from the aspects of sound insulation and energy conversion. On this basis, the future development prospect of piezoelectric metamaterials in underwater equipment is introduced.

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“…Therefore, the wavefront can be flexibly shaped according to the generalized Snell's law. Fascinating applications based on metasurfaces have been demonstrated such as beam steering and focusing [45][46][47][48][49], holographic imaging [50][51][52], acoustic levitation [53,54], perfect absorption [55,56], acoustic orbital angular momentum [57,58], and intelligent information processing [59]. Recently, the concept of metasurfaces has been extended from acoustic to elastic waves to achieve unusual wave behaviors, including source illusion [60], ultrathin waveguides [61], and flexural wave absorption [62], that are challenging to realize in conventional solid media.…”

Section: Wave Transmission Manipulation With Metastructuresmentioning

confidence: 99%

“…In acoustic sensing with metastructures, one important research area is overcoming the classical diffraction limit to improve image resolution. Mechanisms such as negative refraction, anisotropy, and resonant tunneling are widely used to manipulate propagative and evanescent waves for subwavelength imaging [47], focusing [78], and edge detection [79]. Differently from the above sensing paradigm, this review mainly focuses on directional acoustic sensing in this section.…”

Section: Directional Acoustic Sensingmentioning

confidence: 99%

Spatial information coding with artificially engineered structures for acoustic and elastic wave sensing

Jiang

2022

Front. Phys.

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Acoustic and elastic waves carry a wealth of useful physical information in real world. Sensing acoustic and elastic waves is very important for discovering knowledge in various fields. Conventional wave sensing approaches generally require multiple expensive sensors and complex hardware systems due to the uniform spatial transmission characteristics of physical fields. These limitations prompt the development of wave sensing strategies with high integration degree, lightweight structure, and low hardware cost. Due to their extraordinary physical properties, artificially engineered structures such as metastructures can encode the physical field information by flexibly manipulating the transmission characteristics of acoustic and elastic waves. The fusion of information coding and wave sensing process breaks through the limitations of conventional sensing approaches and reduces the sensing cost. This review aims to introduce the advances in spatial information coding with artificially engineered structures for acoustic and elastic wave sensing. First, we review the enhanced spatial wave sensing with metastructures for weak signal detection and source localization. Second, we introduce computational sensing approaches that combines the spatial transmission coding structures with reconstruction algorithms. Representative progress of computational sensing with metastructures and random scattering media in audio source separation, ultrasonic imaging, and vibration information identification is reviewed. Finally, the open problems, challenges, and research prospects of the spatial information coding structures for acoustic and elastic wave sensing are discussed.

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Acoustic focusing and imaging via phononic crystal and acoustic metamaterials

Cited by 72 publications

References 178 publications

Self-powered non-reciprocal phononic logic gates

Self-powered non-reciprocal phononic logic gates

A review of piezoelectric metamaterials for underwater equipment

Spatial information coding with artificially engineered structures for acoustic and elastic wave sensing

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