Realizing a low-frequency and broad bandgap is extremely challenging because the lattice
constant, equivalent stiffness, and equivalent density must be taken into account in practice …

This work presents the design, manufacture, and experimental testing of a three-
dimensional twisted phononic crystal made of a single-phase material. A broad …

Chiral phononic crystals (PnCs) provide unique properties not offered by conventional
metamaterial based on classic Bragg scattering and local resonance. However, it is …

In this work, we present a single low-profile metamaterial that provides bandgaps of acoustic
and elastic waves at the same time. This was done by ensuring impedance mismatch in two …

The properties of metamaterials depend on not only their constituents but also the intrinsic
microstructures. Phononic crystals, as one type of metamaterials whose attributes …

Chiral phononic crystals provide unique properties not offered by conventional phononic
material based on Bragg scattering and local resonance. However, it is insufficient to only …