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

Space-time-varying materials pledge to deliver nonreciprocal dispersion in linear systems
by inducing an artificial momentum bias. Although such a paradigm eliminates the need for …

Willis materials are complex media characterized by four macroscopic material parameters,
the conventional mass density, the bulk modulus, and two additional Willis coupling terms …

This paper presents a diatomic-chain locally resonant acoustic metamaterial (LRAM)
structure with negative-stiffness mechanism for enhanced suppression of vibration …

We investigate how Rayleigh waves interact with time-modulated resonators located on the
free surface of a semi-infinite elastic medium. We begin by studying the dynamics of a single …

One-dimensional phononic materials with material fields traveling simultaneously in space
and time have been shown to break elastodynamic reciprocity resulting in unique wave …

Non-reciprocal wave propagation in acoustic and elastic media has received much attention
of researchers in recent years. This phenomenon can be achieved by breaking the …

In this manuscript we investigate one-way wave propagation in spatio-temporal phononic
wave-guides in which the modulation of material properties is provided piecewise in space …

Unraveling real eigenfrequencies in non-Hermitian PT-symmetric Hamiltonians has opened
avenues in quantum physics, photonics, and most recently, phononics. However, the …

Acoustic nonreciprocity has been shown to enable a plethora of effects analogous to
phenomena seen in quantum physics and electromagnetics, such as immunity from …