achromatic

Broadband achromatic metalens focuses light regardless of polarization

We live in a polarized world. No, we aren't talking about politics — we're talking about light. Much of the light we see and use is partially polarized,…

Brightness and Darkness as Perceptual Dimensions

One corollary of this assumption is that achromatic colors, or perceived grey shades, are contained in a one-dimensional (1-D) space varying from bright to…