Selfies are everywhere, but they change the way we perceive our own faces. There are a few reasons that happens.

In a recent study, researchers have developed a compound metalens that enables distortion-free imaging. The study, published in Engineering, presents ...

(a) A singlet metalens suffers from large barrel distortion. (b) A compound metalens effectively eliminates the barrel distortion. (c, d) Ray-tracing modeling of the (c) singlet and (d) compound ...

The metalens exhibited diffraction-limited performance across a wide field of view of 140° and a remarkably low barrel distortion of less than 2%. In contrast, a reference metalens without ...