What question did this study set out to answer?

The aim is to achieve precise control over complex elastic wave trajectories with minimal diffraction for various applications.

Tailoring arbitrary convex self-bending and low-diffraction elastic waves via deep-subwavelength metasurfaces

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Experimental validation demonstrates controlled elastic wave trajectories in advanced metasurfaces, suggesting new engineering possibilities.

The aim is to achieve precise control over complex elastic wave trajectories with minimal diffraction for various applications.
Utilized deep-subwavelength elastic metasurfaces with optimized unit cells.
Employed a multi-objective inverse design methodology for phase profile tailoring.
Conducted numerical simulations and experimental measurements to validate performance.
Demonstrated tailoring of arbitrary convex self-bending elastic waves with low diffraction over extended distances.
The intensity distribution of the self-bending beams resembles a squared Airy function.
Promised new applications in energy delivery, sensing, and wave-based communication.

Guo et al. (2026) studied this question.

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Experimental validation demonstrates controlled elastic wave trajectories in advanced metasurfaces, suggesting new engineering possibilities.