Scientists have created experimental prototype invisibility cloak

device is made in the shape of a rhombus, which is located inside the cavity of the body concealed. The prototype is running only in two-dimensional mode, as assembled on a planar substrate. In addition, the body becomes invisible in only one orientation (shown - horizontal). "It's like a map of" Alice in Wonderland ", they are not visible from the side, but perfectly recognizable in other orientations" - said one of the study's authors, Professor David Smith.

Powered cloak invisible due to the fact that the radiation incident on its walls (in the figure - to the left), first curved and bypasses the internal cavity, and then re-emitted from the other end of the device. Here, the wave field is restored in exactly the same form in which it was originally. Because of this, the observer, who is concealed behind the body, may not notice the presence of a foreign body inside the device.

The prototype of invisibility cloak was first introduced in 2006, but only now it failed to deliver on many defects such as internal reflection between the walls.

A key element of such invisibility cloaks are walls made of special materials, whose properties are not determined by the chemical composition and internal structure. They are called metamaterials, and can be used to create, for example, unusual lenses or parts of thermal computer. The size of the elements depends on what wavelength device works. Microwave radiation has a much longer wavelength than visible light, so for him to create invisibility cloak is much easier.

via factroom.ru