Metamaterials have been characterized by effective medium parameters over the past
decades due to the subwavelength nature of meta-atoms. Once the metamaterials are …

The recently proposed digital coding metasurfaces make it possible to control
electromagnetic (EM) waves in real time, and allow the implementation of many different …

Harmonic manipulations are important for applications such as wireless communications,
radar detection and biological monitoring. A general approach to tailor the harmonics …

Metasurfaces are thin two-dimensional metamaterial layers that allow or inhibit the
propagation of electromagnetic waves in desired directions. For example, metasurfaces …

This review discusses the evolution of the various radar cross-section (RCS) reduction
techniques, with an emphasis on metasurfaces. The paper first introduces the terms RCS …

Huygens' metasurfaces demonstrate almost arbitrary control over the shape of a scattered
beam; however, its spatial profile is typically fixed at the fabrication time. The dynamic …

Spatial polarization converter can shift the polarization state of incident wave to another
state in a specific frequency band. The traditional polarization conversion devices mainly …

Interaction of electromagnetic radiation with time-variant objects is a fundamental problem
whose study involves foundational principles of classical electrodynamics. Such study is a …

Metasurfaces represent one of the most vibrant fields of modern science and technology. A
metasurface is a complex electromagnetic structure, which is typically deeply …

This paper presents space-time varying (STV) metasurfaces for simultaneously controlling
the spatial and temporal spectra of electromagnetic waves. These metasurfaces transform …