Artificial chiral nanostructures have been subjected to extensive research for their unique
chiroptical activities. Planarized chiral films of ultrathin thicknesses are in particular demand …

During the past few years, metasurfaces have been used to demonstrate optical elements
and systems with capabilities that surpass those of conventional diffractive optics. Here, we …

In the wake of intense research on metamaterials the two-dimensional analogue, known as
metasurfaces, has attracted progressively increasing attention in recent years due to the …

Relying on abrupt phase discontinuities, metasurfaces characterized by a transversely
inhomogeneous surface impedance profile have been recently explored as an ultrathin …

The angular response of thin diffractive optical elements is highly correlated. For example,
the angles of incidence and diffraction of a grating are locked through the grating momentum …

Background Metamaterials (MMs) are smartly engineered structures with rationally
designed, nanostructured building blocks that allow us to build devices with distinct …

Methods to analyze and synthesize two-dimensional, bianisotropic metamaterials
(metasurfaces) are presented. First, a general bianisotropic metasurface is analyzed by …

The metasurface concept has emerged as an advantageous reconfigurable antenna
architecture for beam forming and wave-front shaping, with applications that include satellite …

Optical metamaterials are usually based on planarized, complex-shaped, resonant nano-
inclusions. Three-dimensional geometries may provide a wider set of functionalities …

We demonstrate that metal–insulator–metal configurations, with the top metal layer
consisting of a periodic arrangement of differently sized nanobricks, can be designed to …