Generation of multiband spoof surface acoustic waves via high-order modes

Wu, Li; Song, Gang; Cao, Wen; Cheng, Qiang; Cui, Tie Jun; Jing, Yun

doi:10.1103/physrevb.97.214305

Cited by 10 publications

(4 citation statements)

References 37 publications

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“…1b indicates that the dispersion curves of mode 0, mode 1 and mode 2 are on the left side of the air line when the relative refractive index is 1. Consequently, acoustic waves cannot be converted to SWs [26]. On the other hand, in Fig.…”

Section: Conceptual Designmentioning

confidence: 97%

Asymmetric transmission of acoustic waves in a waveguide via gradient index metamaterials

Cao

Zhang

et al. 2019

Science Bulletin

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Section: Conceptual Designmentioning

confidence: 97%

Asymmetric transmission of acoustic waves in a waveguide via gradient index metamaterials

Cao

Zhang

et al. 2019

Science Bulletin

Self Cite

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“…Recently, the research interest of SASWs is reignited to realize the analogue acoustic phenomenon [22][23][24]. This kind of SASWs propagated along the interface between a background medium and structured rigid plate are different from conventional acoustic surface waves on the surface of natural acoustic materials, whose properties are closely dependent on material parameters [25].…”

Section: Introductionmentioning

confidence: 99%

Rainbow trapping of spoof acoustic surface waves in a defective closed surface

Wu¹,

Quan²,

Yin³

et al. 2020

J. Phys. D: Appl. Phys.

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In this paper, we demonstrate that rainbow trapping of spoof acoustic surface waves (SASWs) can be realised by introducing structured defects on a textured closed surface in the subwavelength scale. To analyse the basic mechanism of the trapping of SASWs, we first introduce a defective zigzag groove in a closed surface and illustrate that the SASWs can be effectively trapped in the defect when the frequency exceeds the cut-off frequency of the periodic grooves on both sides. Subsequently, we experimentally demonstrate the spatial–spectral separation effect of SASWs by introducing three defective zigzag grooves with different curl numbers in the closed surface. Finally, we design a structure with gradient defective zigzag grooves to show the rainbow trapping of SASWs and spatial separation of different frequency components at different positions. Our results may have potential applications in miniaturised acoustic devices.

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“…The spoof plasmon analogue of MIM is the doubly-corrugated waveguide, which comprises a spoofinsulator-spoof (SIS) waveguide [11,12]. Following the concept of electromagnetic spoof SPPs, the analogue acoustic phenomenon was proposed and investigated in several papers [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. In contrast to conventional acoustic surface waves in which the waves propagate on the surface of solids and the properties are closely dependent on the material parameters [30], spoof acoustic surface waves propagate along the interface between the background medium and a corrugated rigid plate due to coupling between the oscillation inside the individual holes and the mutual near-field coupling between the adjacent holes.…”

Section: Introductionmentioning

confidence: 99%

Spoof-Fluid-Spoof Acoustic Waveguide and its Applications for Sound Manipulation

Cselyuszka

Alù

2019

Phys. Rev. Applied

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We explore the implementation of a spoof-fluid-spoof (SFS) acoustic waveguide, which is the acoustic analogue of a metal-insulator-metal waveguide in plasmonics. The proposed structure consists of two corrugated rigid surfaces separated by a fluid layer. The properties of the guided acoustic modes between corrugated rigid parallel plates are analytically and numerically studied by deriving their dispersion relation and through a careful analysis of symmetric and antisymmetric modes supported by this structure. Similar to plasmonic waveguides, it is shown that the dispersion relation of the proposed SFS acoustic waveguide, and the supported group and phase velocities, can be largely controlled by changes in the geometrical parameters of the waveguide, opening the possibility for application of this technology for acoustic delay lines, modulators, and sensors. The analytical and numerical results are validated through experiments in a controlled environment.

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Generation of multiband spoof surface acoustic waves via high-order modes

Cited by 10 publications

References 37 publications

Asymmetric transmission of acoustic waves in a waveguide via gradient index metamaterials

Asymmetric transmission of acoustic waves in a waveguide via gradient index metamaterials

Rainbow trapping of spoof acoustic surface waves in a defective closed surface

Spoof-Fluid-Spoof Acoustic Waveguide and its Applications for Sound Manipulation

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