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Updated: Jul 10, 2025
06:51
Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
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Superwavelength self-healing of spoof surface sonic Airy-Talbot waves
Hao-Xiang Li1,2, Jing-Jing Liu1, Zhao-Xian Chen1
1Key Laboratory of Modern Acoustics, MOE, Institute of Acoustics, Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
Nature Communications
|November 22, 2023
Summary
Researchers created a confined Airy-Talbot effect using spoof surface acoustic waves (SSAWs) on a structured surface. This acoustic self-imaging offers lensless imaging and robust acoustic communication capabilities.
Area of Science:
- Acoustics
- Wave Phenomena
- Metamaterials
Background:
- Self-imaging phenomena, including the Talbot effect and Airy beams, enable lensless imaging by periodically repeating field distributions.
- Guiding waves along bent trajectories and overcoming diffraction effects are key challenges in wave manipulation.
Purpose of the Study:
- To investigate and engineer a highly confined Airy-Talbot effect using spoof surface acoustic waves (SSAWs).
- To explore the application of this effect in lensless acoustic imaging and high-density acoustic communication.
Main Methods:
- Structuring subwavelength resonators on an acoustically impenetrable surface to support SSAWs.
- Utilizing a linear array of loudspeakers to control the amplitude and phase of SSAWs.
- Evaluating self-healing properties against superwavelength obstacles and demonstrating acoustic communication capabilities.
Main Results:
- Achieved a highly confined Airy-Talbot effect, extending Talbot distances and compressing lobes.
- Demonstrated robust self-healing of scattering patterns against obstacles.
- Introduced a novel mechanism for high-density acoustic communication using subwavelength Airy beams.
Conclusions:
- The engineered SSAW surface effectively confines the Airy-Talbot effect, overcoming traditional limitations.
- This acoustic self-imaging technique shows promise for advanced lensless imaging and secure, high-capacity acoustic communication.
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