A miniature version of Harry Potter's invisibility cloak now exists, though it works only in microwave light, and not visible light, so far.
Still, it's a nifty trick, and the physicists who've created the new cloak say it's a step closer to realizing the kind of invisibility cloak that could hide a person in broad daylight.
The invention is made of a new kind of material called a metascreen, created from strips of copper tape attached to a flexible polycarbonate film. The copper strips are only 66 micrometers (66 millionths of a meter) thick, while the polycarbonate film is 100 micrometers thick, and the two are combined in a diagonal fishnet pattern.
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