Possibly a very big deal, but article says so far they’ve only made it work in the near infrared: 1.2 to 1.7 microns, which is somewhat less than the bandwidth of the visible spectrum.
Also they don’t give the “speed” (or “f-number”) of the lenses they’ve produced. If they can make f/2.8 or f/2, that would be revolutionary. If they’re at f/60 or f/120, they’re not much better than a pinhole camera.
Still, interesting, and potentially a game changer.
The visible spectrum is from 390nm to 750nm, a range of 360nm.
These lenses work in the near infrared, from 1200nm to 1700nm, a range of 500nm. That is a bandwidth somewhat GREATER than the visible spectrum.