[ClearCase_guy]

The major limitation is that the current design can only bend the light of a single wave-length at a time, and does not work with the entire frequency range of the visible spectrum.

"How to create a design that works for all colours of visible light at the same time will be a big technical challenge, but we believe it's possible," Professor Shalaev said. "In principle, it's doable."

It sounds neat, amd I'm happy to see the advance.

But the headline writer's definition of "close" is not what I would call "close".

[AFPhys]

Close?

LOL...

Great concept... but “close”? No Way.