Chromatic aberration is a major challenge faced by metalenses. Current methods to achieve
broadband achromatic operation in metalenses usually suffer from limited size, numerical …

Metalenses have shown great promise in their ability to function as ultracompact optical
systems for focusing and imaging. Remarkably, several designs have been recently …

Subwavelength imaging requires the use of high numerical aperture (NA) lenses together
with immersion liquids in order to achieve the highest possible resolution. Following exciting …

Geometric phase is a unifying and central concept in physics, including optics. As a matter of
fact, optics played a pivotal role from the inception of this new paradigm, as some of the first …

Metasurfaces have enabled precise electromagnetic (EM) wave manipulation with strong
potential to obtain unprecedented functionalities and multifunctional behavior in flat optical …

Diffractive photonic devices manipulate light via local and nonlocal optical modes. Local
devices, such as metasurfaces, can shape a wave front at multiple selected wavelengths …

Chromatic aberration-free meta-devices (eg, achromatic meta-devices and abnormal
chromatic meta-devices) play an essential role in modern science and technology. However …

Metasurfaces have attracted increasing attention and provide promising solutions for cost‐
effective and highly efficient optics due to their unprecedented capabilities in light …

Spiral phase contrast imaging offers an excellent opportunity to observe non‐labeled
biological samples with slight variations in refractive index or thickness. However, the overall …

In this paper, we report dispersion-engineered metasurfaces with distinct functionalities
controlled by wavelength. Unlike previous approaches based on spatial multiplexing or …