Abstract
Abstract
Elastic metasurfaces are artificial planar structures endowed with unique properties that natural materials do not possess. They exhibit significant potential in the realm of wave control. Despite the widespread attention garnered by metasurfaces due to their ultrathin profile, ease of design and fabrication, and enhanced physical characteristics, they still grapple with the challenge posed by their narrow operational bandwidth. In this study, a structurally compact, subwavelength-scale honeycomb metasurface is proposed for broadband manipulation of flexural waves. Through modulation of the unit cell dimensions, precise control over the phase is achieved, enabling a series of remarkable wavefront manipulations, including anomalous refraction, energy concentration, self-bending beam, and source illusion. Results indicate that compared to conventional localized resonance metasurfaces, the introduced approach offers advantages in terms of broad bandwidth, compactness, and high efficiency. This endeavor holds the potential to provide more comprehensive methods for vibration attenuation, noise reduction, and wave control.