Tunable optical devices powered by metasurfaces provide a new path for functional planar
optics. In particular, lenses with tunable focal lengths can play a key role in various fields …

Flat optics consisting of nanostructures of high–refractive index materials produce lenses
with thin form factors that tend to operate only at specific wavelengths. Recent attempts to …

A curved integral imaging three-dimensional (3D) display attracts a lot of interest due to its
enhanced 3D sense of immersion and wider viewing angle. In this paper, a microlens array …

The emergence of metamaterials has presented an unprecedented platform to control the
fundamental properties of light at the nanoscale. Conventional metamaterials, however …

Thin, lightweight micro‐diffractive optical elements (M‐DOEs) are of great significance to
integrated optics. However, the narrow working bandwidth of M‐DOEs allows them to …

Terahertz (THz) lens constitutes a vital component in the THz system. Metasurfaces-based
THz metalenses and classical bulky lenses are severely constrained by chromatic/spherical …

Chalcogenide glass has gradually evolved into a new generation of infrared optical glasses.
As 2 Se 3, a representative chalcogenide glass in the mid-infrared wavelength band, is …

Metasurfaces have outstanding capabilities in manipulating light, enabling functions such as
focusing, vortex beam generation, and holography. Such versatile light manipulation, initially …

Metalenses with achromatic performance offer a new opportunity for high-quality imaging
with an ultra-compact configuration; however, they suffer from complex fabrication processes …

Metalenses, known as flat metasurface lenses based on subwavelength phase modulations,
have been widely applied to compact and multifunctional optical devices due to their high …