One of the fastest-expanding study areas in optics over the past decade has been
metasurfaces (MSs). These subwavelength meta-atom-based ultrathin arrays have been …

Structural colors resulting from the interference between incident light and structures are
ubiquitous in nature and daily life. In contrast to conventional chemical pigments and dyes …

Metasurfaces, composed of 2-D planar arrays of sub-wavelength metallic or dielectric
scatterers, have provided unprecedented freedoms in manipulating electromagnetic (EM) …

Metasurfaces offer great opportunities to control electromagnetic (EM) waves, but currently
most metadevices work either in pure reflection or pure transmission mode, leaving half of …

Achieving multiple diversified functionalities in a single flat device is crucial for
electromagnetic (EM) integration, but available efforts suffer the issues of device thickness …

Nonreciprocal radiation refers to electromagnetic wave radiation in which a structure
provides different responses under the change of the direction of the incident field. Modern …

A study of optical aberrations for flat lenses based on phase discontinuities is reported. The
wave aberration function and the analytical expression of the aberrations up to the 4th order …

Metamaterials offer exciting opportunities that enable precise control of amplitude,
polarization and phase of the light beam at a subwavelength scale. A gradient metasurface …

The use of microstrip transmitarrays (TAs) and reflectarrays (RAs) is essential in long-range
communication systems because of their high-gain radiations, narrow beam widths, simple …

A single-layer focusing gradient metasurface (MS) built by one element-group is proposed.
The element-group is designed by well connecting the phase shift range of two similar …