In recent years, metamaterials and metasurfaces have prospered in many fields of “science
and technology,” covering the entire electromagnetic spectrum. Metasurface devices …

Recently, there are growing interests in develo** super‐resolution metalenses for
applications of focusing and imaging. On one hand, various sub‐diffraction metalenses have …

The correction of chromatic aberration is essential for promoting broadband imaging
systems, which can be accomplished by recently proposed broadband achromatic …

In this Letter, we aim to answer the fundamental question of what will happen when two
layers of Pancharatnam–Berry phase elements are superimposed on each other. The …

The recently developed achromatic metalenses have exhibited a significant potential to
replace the conventional bulky lenses. However, the numerical aperture (NA) of current …

Significance The scanning fiber endoscope (SFE), an ultrasmall optical imaging device with
a large field-of-view (FOV) for having a clear forward view into the interior of blood vessels …

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

Ultraviolet (UV) optical devices have plenteous applications in the fields of nanofabrication,
military, medical, sterilization, and others. Traditional optical components utilize gradual …

Metasurfaces with superior capabilities to tailor wave fronts of light have become one of the
most widely investigated optical elements. Incorporating tunable features into the …

Metalenses are one of the most promising metasurface applications. However, all-dielectric
reflective metalenses are rarely studied, especially regarding their off-axis focusing …