Composite hexagonal pentamode acoustic metamaterials with tailored properties

Li, Qi; Zhang, Mingquan

doi:10.1088/1361-648x/abaf13

Cited by 11 publications

(10 citation statements)

References 54 publications

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“…However, one of the biggest challenges for an underwater metasurface is the difficulty of impedance matching. A suitable approach is using a pentamode material (PM), which is fabricated from rigid solids (usually with metal) but exhibits fluid-like acoustic properties [35][36][37][38][39][40].…”

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confidence: 99%

Underwater acoustic multiplexing communication by pentamode metasurface

Sun¹,

Shi²,

Sun³

et al. 2021

J. Phys. D: Appl. Phys.

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As the dominant information carrier in water, the acoustic wave is widely used for underwater detection, communication and imaging. Even though underwater acoustic communication has been greatly improved in the past decades, it still suffers from slow transmission speeds and low information capacity. The recently developed acoustic orbital angular momentum (OAM) multiplexing communication promises a high efficiency, large capacity and fast transmission speed for acoustic communication. However, the current works on OAM multiplexing communication mainly appear in airborne acoustics. The application of acoustic OAM for underwater communication remains to be further explored and studied. In this paper, an impedance matching pentamode demultiplexing metasurface is designed to realize multiplexing and demultiplexing in underwater acoustic communication. The impedance matching of the metasurface ensures high transmission of the transmitted information. The information encoded into two different OAM beams as two independent channels is numerically demonstrated by realizing real-time picture transfer. The simulation shows the effectiveness of the system for underwater acoustic multiplexing communication. This work paves the way for experimental demonstration and practical application of OAM multiplexing for underwater acoustic communication.

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mentioning

confidence: 99%

Underwater acoustic multiplexing communication by pentamode metasurface

Sun¹,

Shi²,

Sun³

et al. 2021

J. Phys. D: Appl. Phys.

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“…Anisotropic properties [5,6] were studied by varying their structures. Besides the original model, the PMs with different unit cells [7][8][9], different cross-section shapes [10], asymmetric arms [11,12], composite materials [13][14][15], or structures [16,17] were studied for their improved properties. Due to the complicated structures, 3D PMs can be fabricated by selective laser melting (SLM), [18] 3D printer [19], dip-in direct-laser-writing optical lithography [20], etc.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Composite Acoustic Metamaterials of Rectangular Unit Cell from Pentamode to Band Gap

Zhang

2021

Crystals

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Pentamode metamaterials have been receiving an increasing amount of interest due to their water-like properties. In this paper, a two-dimensional composite pentamode metamaterial of rectangular unit cell is proposed. The unit cells can be classified into two groups, one with uniform arms and the other with non-uniform arms. Phononic band structures of the unit cells were calculated to derive their properties. The unit cells can be pentamode metamaterials that permit acoustic wave travelling or have a total band gap that impedes acoustic wave propagation by varying the structures. The influences of geometric parameters and materials of the composed elements on the effective velocities and anisotropy were analyzed. The metamaterials can be used for acoustic wave control under water. Simulations of materials with different unit cells were conducted to verify the calculated properties of the unit cells. The research provides theoretical support for applications of the pentamode metamaterials.

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“…Anisotropic properties [5,6] were studied by varying their structures. Besides the original model, the PMs with different unit cells [7][8][9], different cross-section shapes [10], asymmetric arms [11,12], composite materials [13][14][15] or structures [16,17] were studied for their improved properties. Due to the complicated structures, 3D PMs can be fabricated by selective laser melting (SLM), [18] 3D printer [19] and dip-in direct-laser-writing optical lithography [20], etc.…”

Section: Introductionmentioning

confidence: 99%