Diffusion and wave propagation are both fundamental transport mechanisms, but they have
intrinsically different dynamics, governing equations, and applications. Over the past …

Diffusion driven by temperature or concentration gradients is a fundamental mechanism of
energy and mass transport that inherently differs from wave propagation in both physical …

The invisible cloak has attracted great attention due to its significant influences on science
and engineering. Active elastic wave metamaterials provide superior controllable …

The application of transformation theory to underwater acoustics has been a challenging
task because highly anisotropic density is unachievable in water. A possible strategy is to …

Hierarchy provides unique opportunities for the design of advanced materials with superior
properties that arise from architecture, rather than from constitutive material response …

Guided waves, elastic waves propagating through bounded structures, play a pivotal role in
various applications, including ultrasonic non-destructive testing and structural health …

Ultralight architected materials enabled by advanced manufacturing processes have
achieved density-normalized strength and stiffness properties that are inaccessible to bulk …

Flexural wave propagation is common in thin structures and plays a key role in vibrations of
structures. Designs of flexural wave absorbers for vibration control have been constantly …

Phononic crystals and elastic metamaterials have recently received significant attention due
to their potential for unconventional wave control. Despite this interest, one outstanding …

In this paper, we present a unit cell showing a band-gap in the lower acoustic domain. The
corresponding metamaterial is made up of a periodic arrangement of one unit cell. We …