Metamaterials (MMs), which include phononic crystals (PCs) as a particular type, exhibit
anomalous wave propagation properties through artificial design of topologies or lattice …

Acoustic metasurfaces are at the frontier of acoustic functional material research owing to
their advanced capabilities of wave manipulation at an acoustically vanishing size. Despite …

In recent years, the innovative design of metamaterials and the study of bandgap
characteristics have become the focus of research. The flexible setting of small added mass …

The concept of odd elasticity was recently introduced to characterize the elastic behavior of
solids that consist of active components, exhibiting an asymmetric elastic modulus tensor. In …

Topological elastic waves provide novel and robust ways for manipulating mechanical
energy transfer and information transmission, with potential applications in vibration control …

Higher-order topological insulators (HOTIs) exhibit hierarchical and multidimensional
features of topological states, expanding the applications of topological insulators (TIs) …

Higher harmonic generation (HHG) of elastic waves is beneficial for various applications,
including engineering nondestructive testing, imaging, therapy, etc. Due to the ubiquity of …

Topological elastic wave metamaterials have shown significant advantages in manipulating
wave propagation and realizing localized modes. However, topological properties of most …

Recent advances have demonstrated that the non-Hermitian skin effect (NHSE), induced by
system non-Hermiticity, can manipulate the localization of in-gap topological edge modes …

This Letter presents an experimental demonstration of tunable exceptional points (EPs) in
an electromechanical waveguide. EPs are non-Hermitian singularities typically found in …