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Updated: May 7, 2026
06:51
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
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Bioinspired acoustic metasurface for simultaneous bilateral wave manipulation.
Heye Xiao1, Jiaqi Yu1, Ming Yan2
1Unmanned System Research Institute, Northwestern Polytechnical University, Xi'an, 710072, China.
Discover Nano
|May 5, 2026
Summary
Researchers developed a novel bioinspired acoustic metasurface capable of independently controlling reflected and transmitted sound waves. This breakthrough enables versatile full-space wavefront manipulation for enhanced acoustic applications.
Area of Science:
- Acoustics
- Materials Science
- Wave Physics
Background:
- Acoustic metasurfaces offer thin-film, low-frequency sound manipulation.
- Current metasurfaces often face limitations due to unidirectional incidence, restricting spatial adaptability.
- Full-space wavefront control is desired for advanced metasurface functionalities.
Purpose of the Study:
- To design a bioinspired acoustic metasurface unit for independent modulation of reflected and transmitted sound waves.
- To achieve arbitrary combination of transmitted and reflected phases.
- To enable bidirectional incidence operation for enhanced spatial adaptability.
Main Methods:
- Proposed a bioinspired metasurface unit comprising coiling slits and Helmholtz transmission tunnels.
- Established a theoretical acoustic impedance model for the metasurface unit.
- Performed numerical simulations and experimental validation.
Main Results:
- The metasurface unit independently modulates reflected and transmitted sound waves.
- Transmitted and reflected phases can be combined arbitrarily within structural parameter ranges.
- Simultaneous realization of Bessel beam generation, sound focusing, and surface wave conversion in reflection and transmission modes.
- Demonstrated functionality under forward and backward incidence due to symmetrical configuration.
Conclusions:
- The proposed bioinspired acoustic metasurface overcomes unidirectional incidence limitations.
- This design enables versatile, full-space wavefront control with independent modulation capabilities.
- The findings offer new avenues for expanding acoustic metasurface functionalities and applications.
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