In solid state physics, a bandgap (BG) refers to a range of energies where no electronic
states can exist. This concept was extended to classical waves, spawning the entire fields of …

The introduction of engineered resonance phenomena on surfaces has opened a new
frontier in surface science and technology. Pillared phononic crystals, metamaterials, and …

In the past decades, many mechanical metamaterials with uncommon static properties have
been reported. On the other hand, mechanical metamaterials possessing extraordinary …

The advancement in electromagnetic metamaterials, which commenced three decades ago,
experienced a rapid transformation into acoustic and elastic systems in the forms of …

We theoretically report on an innovative and practical acoustic energy harvester based on a
defected acoustic metamaterial (AMM) with piezoelectric material. The idea is to create …

Over the past decade there has been a great amount of research effort devoted to the topic
of acoustic metamaterials (AMMs). The recent development of AMMs has enlightened the …

The Acoustic Black Hole (ABH) effect can be used to effectively reduce structural vibrations
by trap** flexural waves in a thin-walled structure with a power-law thickness variation. In …

Elastic metamaterial is a type of artificial composite material/structure with unique
subwavelength physics property, which shows attractive potential application in low …

The development of phononic crystals, especially their interaction with topological
insulators, allows exploration of the anomalous properties of acoustic/elastic waves for …

The classical distinction between a structure and a material is increasingly blurred in lattice
materials made from beam and shell‐like structures. This chapter is concerned with the …