Vol. 1 (2025)

Articles

High-Order Diffractive Elastic-Wave Manipulations Based on Piezoelectric Metasurfaces

Published 2025-12-29

  • Ruitao Li
    • ,
  • Bochen Ren
    • ,
  • Bing Li

Ruitao Li
School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China

Bochen Ren
School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China

Bing Li
School of Aeronautics, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, China and National Key Laboratory of Strength and Structural Integrity, Xi’an, China

Abstract

Elastic metasurfaces offer powerful capabilities for manipulating wave propagation, with applications ranging from vibration attenuation and noise isolation to structural health monitoring. However, the multimodal nature and strong dispersion of elastic-waves impede the realization of stable, broadband control. While piezoelectric materials provide a pathway toward active tunability, the manipulation of higher-order diffracted guided waves remains a significant challenge, restricting practical engineering utility. Here, we propose a tunable piezoelectric elastic metasurface that overcomes these limitations. By adjusting piezoelectric parameters via simple external circuits—without modifying the structural substrate—we demonstrate versatile control over elastic-waves and their higher-order diffraction modes,includingadaptive anomalous refraction,tunable subwavelength focusing,source illusion etc. This approach enables diverse exotic wave phenomena, bridging the gap between theoretical research and the practical application of intelligent wave manipulation.

Keywords

Elastic-waves, high-order diffraction, piezoelectric metasurfaces, phase modulation, asymmetric transmission

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