via BBC News

Researchers in the US and Britain have unveiled their blueprints for building a cloaking device.

…Both groups propose methods using the unusual properties of so-called “metamaterials” to build a cloak.

These metamaterials can be designed to induce a desired change in the direction of electromagnetic waves, such as light. This is done by tinkering with the nano-scale structure of the metamaterial, not by altering its chemistry.

…”What you’re trying to do is guide light around an object, but the art is to bend it such that it leaves the object in precisely the same way that it initially hits it. You have the illusion that there is nothing there…”