Broadband aberration-free focusing reflector for acoustic waves

Wang, Aixia; Qu, Shaobo; Ma, Hongjuan; Wang, Jiafu; Jiang, Wei; Feng, Ming

doi:10.1016/j.physleta.2017.08.038

Cited by 6 publications

(1 citation statement)

References 18 publications

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“…Acoustic metasurfaces have been studied intensively in the past few years because of their strong and robust capability to manipulate waves with subwavelength thickness [1][2][3][4][5][6][7][8]. Based on their structure, most metasurfaces can be categorized into three types: coiling-up-space [9][10][11][12][13][14][15][16], Helmholtz-resonators [17][18][19][20] and membranes [21][22][23][24]. The coiling-up-space metasurface was first proposed to focus acoustic waves by mimicking the gradient refractive index lens by using units of different sizes [9], which were designed and fabricated to control phase shifts over a 2π range [10,11].…”

Section: Introductionmentioning

confidence: 99%

Tunable metasurface for acoustic wave redirection, focusing and source illusion

Chen

Shao

Negahban

et al. 2019

J. Phys. D: Appl. Phys.

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Metasurfaces present excellent performance in acoustic wave control with subwavelength thickness, but are typically studied and built for fixed applications. This paper looks at a convenient tunable metasurface design with Helmholtz resonance. Moving sliders in the design allow full phase shift with a high transmission ratio in a broad frequency bandwidth. The design can be used for tunable wave front redirection, focusing with varying wavelengths and sound source illusion, as are shown in numerical and experimental examples. This design could be a superb option when there is a need for tunable acoustic wave modulation.

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