Noise pollution has become a significant global problem in recent years. Unfortunately,
conventional acoustic materials cannot offer substantial improvements in noise reduction …

Metamaterials with a Dirac-like cone dispersion at the center of the Brillouin zone behave
like an isotropic and impedance-matched zero refractive index material at the Dirac-point …

Initially proposed to achieve strong noise isolation levels beyond the mass-density law,
acoustic metamaterials (AMMs) have now overturned the conventional views in all aspects …

The last 20 years have witnessed growing impacts of the topological concept on the
branches of physics, including materials, electronics, photonics, and acoustics. Topology …

Dualities are mathematical mappings that reveal links between apparently unrelated
systems in virtually every branch of physics,,,,,,–. Systems mapped onto themselves by a …

The recent breakthrough in metamaterial-based optical computing devices (2014 Science
343 160) has inspired a quest for similar systems in acoustics, performing mathematical …

We present an exact mathematical framework for electromagnetic wave propagation in
periodically time-modulated media, in which the permittivity is homogenous and modulated …

In the field of metamaterials, many intriguing phenomena arise from having a structure which
is periodic in space. In time-dependent structures, conceptually similar properties can arise …

Our aim in this paper is twofold. Firstly, we develop a new asymptotic theory for Floquet
exponents. We consider a linear system of differential equations with a time-periodic …

Acoustic resonators play a key role in the development of subwavelength-sized
technologies capable of interacting with airborne audible sound, from its emission and …