Metalenses are expected to play an increasingly important role in miniaturized and
integrated optical imaging components/systems. However, devising broadband achromatic …

Metasurface-based flat optics is continuously attracting interest owing to its ability for
miniaturization of optical devices and systems. Over the last few years, broadband …

Because of unique superiorities of planar optical devices based on metalens on
manipulating amplitude, phase, polarization, wavelength of incident light, metalenses have …

We designed a high-NA (High numerical aperture) broadband achromatic metalens
consisting of elliptical TiO_2-based integrated-resonant unit-cells. The phase profile for the …

Flat metalenses with tunable focal length have wide applications in modern optical systems
with high integration requirement. Here, by combining propagation phase and geometric …

Metalenses provide unprecedented opportunities to overcome the limitations of
conventional refractive lenses, which have been extensively studied to achieve achromatic …

Midinfrared devices based on metalenses are of great utility for numerous applications,
including free-space communication, imaging, and molecule sensing. However, because of …

Optical metalens has been attracting more and more attention in recent years. To date, it is
still difficult to simultaneously achieve wide field and broadband imaging in the visible …

Metalenses are considered a promising solution for miniaturizing numerous optical systems
due to their light weight, ultrathin thickness and compact size. However, it remains a …

A multifocal metalens, which focuses incident light at multiple foci, has many applications in
imaging systems and optical communications. However, the traditional design strategy of a …