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Directional beam multiplexing using cylindrical holographic acoustic metasurfaces integrated with surface wave
Md Tausif Akram1, Pinaki Mazumder2, Kyungjun Song1
1Department of Mechanical Engineering, Pusan National University, Geumjeong-Ku, Busan 46241, Republic of Korea.
Ultrasonics
|January 28, 2026
Summary
This study introduces a cylindrical holographic acoustic metasurface with surface wave reflectors for efficient acoustic beam multiplexing, enabling simultaneous multi-directional sound projection for advanced applications.
Area of Science:
- Acoustics
- Metamaterials
- Wave Physics
Background:
- Acoustic metasurfaces have advanced beamforming and steering.
- Beam multiplexing is crucial for multidirectional sound projection.
Purpose of the Study:
- To propose a cylindrical holographic acoustic metasurface integrated with surface wave reflectors (SWRs).
- To achieve efficient acoustic beam multiplexing for multidirectional sound projection.
Main Methods:
- Transitioning from planar to cylindrical geometry for the metasurface.
- Integrating surface wave reflectors (SWRs) to enhance beam collimation and suppress side lobes.
- Utilizing simulations and experimental validation.
Main Results:
- The cylindrical metasurface enables simultaneous generation of multiple highly directional beams.
- Beams can be steered to distinct elevation and azimuthal angles in 3D space.
- High directivity and acoustic field confinement were achieved.
Conclusions:
- The proposed metasurface offers efficient acoustic beam multiplexing using a cylindrical holographic design.
- This technology provides a versatile and scalable conformal platform for spatially multiplexed acoustic beam steering.
- The advancements are significant for applications in sonar, medical imaging, and acoustic communication.
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