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 …

In this review, we take an extensive look at the role that the principles of causality and
passivity have played in various areas of physics and engineering, including in the modern …

Dynamic homogenization theories are powerful tools for describing and understanding the
behavior of heterogeneous media such as composites and metamaterials. However, a major …

Willis materials are composites whose the overall constitutive relations exhibit coupling
between momentum and strain. Recently, piezoelectric Willis materials have been studied …

Metasurfaces are ultrathin planar arrays of carefully tailored subwavelength particles that
enable agile and flexible manipulation of the impinging waves. Originally introduced in …

Engineered piezoelectric metamaterials can possess electro-momentum coupling between
the macroscopic momentum and electric stimuli. This indicates the applicability of such …

Willis dynamic homogenization theory revealed that the effective linear momentum of elastic
composites is coupled to their effective strain. Recent generalization of Willis dynamic …

Local microstructural heterogeneities of elastic metamaterials give rise to non-local
macroscopic cross coupling between stress–strain and momentum–velocity, known as Willis …

Materials with asymmetric microstructure can constitutively couple macroscopic fields from
different physics. Examples include piezoelectric materials that couple mechanical and …

This paper presents a spatial dispersive Willis dynamic homogenization method for acoustic
metamaterials based on multiple scattering theory, which is valid for each physical …