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

Time-varying media have recently emerged as a new paradigm for wave manipulation, due
to the synergy between the discovery of highly nonlinear materials, such as epsilon-near …

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 …

Fizeau drag means that the speed of light can be regulated by the flow of water, owing to the
momentum interaction between photons and moving media. However, the dragging of heat …

Convective thermal metamaterials are artificial structures where convection dominates in the
thermal process. Due to the field coupling between velocity and temperature, convection …

Willis coupling generically stems from bianisotropy or chirality in wave systems.
Nevertheless, those schemes are naturally unavailable in diffusion systems described by a …

Over the past decade, static metasurfaces have proved to be low-profile and efficient
apparatuses for transformation of electromagnetic waves. However, such metasurfaces are …

We present a general framework for the homogenization theory of space-time
metamaterials. By mapping to a frame comoving with the space-time modulation, we derive …

Mechanical metamaterials, also known as architected materials, are rationally designed
composites, aiming at elastic behaviors and effective mechanical properties beyond ('meta') …

A non-Hermitian Weyl equation indispensably requires a three-dimensional (3D)
real/synthetic space, and it is thereby perceived that a Weyl exceptional ring (WER) will not …