Topological Optimization-Enabled Acoustic/Elastic Metasurface for Precise Wave Manipulation
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The controllable propagation of acoustic/elastic waves plays a significant role in various civil and engineering fields, including aerospace, medical diagnostics, geological exploration, and marine technology. Acoustic metasurfaces are artificial structures that allow for the arbitrary control of wave parameters such as amplitude, phase, and polarization through subwavelength-scale microstructure design and macro-ordered arrangement. Due to their ultrathin and flexible nature, they have become a key approach for wave control. However, existing design theories and methodologies struggle to achieve precise modulation of waterborne sound. To address this, this presentation systematically demonstrates the physical mechanisms for precise wave modulation. Different impedance metasurfaces are inversely designed by topological optimization and then fabricated. Both numerical and experimental results are presented to validate the theoretical analysis.
