In this paper, a phononic crystal (PnC) Luneburg lens is designed for harvesting the
mechanical energy of Rayleigh surface waves. The square-latticed PnC is formed by drilling …

We amalgamate two fundamental designs from distinct areas of wave control in physics, and
place them in the setting of elasticity. Graded elastic metasurfaces, so-called metawedges …

We experimentally achieve wave-mode conversion and rainbow trap** in an elastic
waveguide loaded with an array of resonators. Rainbow trap** is a phenomenon that …

This work presents a novel strategy of broadband vibration attenuation using a graded
piezoelectric metamaterial beam. A series of electrode pairs with varying lengths are applied …

We experimentally demonstrate that a rainbow-based metamaterial, created by a graded
array of resonant rods attached to an elastic beam, operates as a mechanical delay-line by …

The rainbow reflection effect describes the broadband spatial separation of wave spectral
components caused by a spatially graded array of resonators. Although mainly studied in …

Metamaterials assemble multiple subwavelength elements to create structures with
extraordinary physical properties (1–4). Optical metamaterials are rare in nature and no …

Topological photonic crystal provides a robust platform for nanophotonic devices. However,
few reports have been found to realize multiple frequency routing based on topological …

The detection and localization of weak sound sources are a topic of great interest in a wide
range of applications, but generally require a pressure amplification and directivity acoustic …

The development of seismic metamaterials has attracted much research interest in the past
decade. Efforts have been made by using experimental and theoretical approaches to …