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 …

Metamaterials are artificial structures with the ability to efficiently control light‐field, attracting
intensive attention in the past few decades. People have studied the working principles …

Varifocal lenses, conventionally implemented by changing the axial distance between
multiple optical elements, have a wide range of applications in imaging and optical beam …

Metasurface-based components are known to be one of the promising candidates for
developing flat optical systems. However, their low working efficiency highly limits the use of …

Optical metasurfaces are two-dimensional arrays of nano-scatterers that modify optical
wavefronts at subwavelength spatial resolution. They are poised to revolutionize optics by …

Polarization is a degree of freedom of light carrying important information that is usually
absent in intensity and spectral content. Imaging polarimetry is the process of determining …

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 …

Integral imaging is a promising three-dimensional (3D) imaging technique that captures and
reconstructs light field information. Microlens arrays are usually used for the reconstruction …

Diffraction gratings disperse light in a rainbow of colors with the opposite order than
refractive prisms, a phenomenon known as negative dispersion. While refractive dispersion …

Nanostructured metasurfaces offer unique capabilities for subwavelength control of optical
waves. Based on this potential, a large number of metasurfaces have been proposed …