Metamaterials are composed of periodic subwavelength metal/dielectric structures that
resonantly couple to the electric and/or magnetic components of the incident …

Conventional optical components such as lenses, waveplates and holograms rely on light
propagation over distances much larger than the wavelength to shape wavefronts. In this …

Structured light, especially beams carrying orbital angular momentum (OAM), has gained
much interest due to its unique amplitude and phase structures. In terms of communication …

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

Metasurfaces are 2D artificial materials consisting of arrays of metamolecules, which are
exquisitely designed to manipulate light in terms of amplitude, phase, and polarization state …

We review the basic physics and applications of a special class of planar metamaterials,
often called metasurfaces, which are composed of optically thin and densely packed planar …

This article reviews recent progress leading to the realization of planar optical components
made of a single layer of phase shifting nanostructures. After introducing the principles of …

Holography, a revolutionary 3D imaging technique, has been developed for storing and
recovering the amplitude and phase of light scattered by objects. Later, single-beam …

The concept of optical phase discontinuities is applied to the design and demonstration of
aberration-free planar lenses and axicons, comprising a phased array of ultrathin …

Flat optical devices thinner than a wavelength promise to replace conventional free-space
components for wavefront and polarization control. Transmissive flat lenses are particularly …