We demonstrate imaging over the visible band using a single planar diffractive lens. This is
enabled via multi-level diffractive optics that is designed to focus over a broad wavelength …

As technology advances, electrical devices such as smartphones have become more and
more compact, leading to a demand for the continuous miniaturization of optical …

Metasurfaces and planar photonic crystals are two classes of subwavelength diffractive
optical devices offering novel functionalities. The former employ independently operating …

Planar achromatic metalenses with a thickness of the order of wavelength have attracted
much attention for their potential applications in ultra-compact optical devices. However …

Metalens is one of the most prominent applications among metasurfaces since it gives
possibilities to replace the conventional lenses for compactness and multi-functionalities …

Metasurfaces, known as ultra‐thin and planar structures, are widely used in optical
components with their excellent ability to manipulate the wavefront of the light. The key …

Metasurfaces have been used to realize optical functions such as focusing and beam
steering. They use subwavelength nanostructures to control the local amplitude and phase …

Driven by the need for enhanced integrated performance and rapid development of ultrathin
multitasked optical devices, this paper experimentally demonstrates monolayer direction …

Metasurfaces have provided a novel and promising platform for realizing compact and high‐
performance optical devices. The conventional metasurface design approach assumes …

Flat optics, metasurfaces, metalenses, and related materials promise novel on-demand light
modulation within ultrathin layers at wavelength scale, enabling a plethora of next …