Scientists create cloak of invisibility

02.04.2013

 

Scientists have created a miniature version of the invisibility cloak like Harry Potter, currently only works in the invisible world of microwaves.

Make an invisibility cloak — still an incredibly difficult task, but scientists have made a big step forward to ensure that a cape that would make a person invisible.
Material used to create invisibility cloak called metaekran, which consists of a copper tape attached to a flexible polycarbonate film. The thickness of the copper strips is only 66 micrometers (66 million times less than a meter), a polycarbonate film — 100 micrometers in thickness.

This invention differs from previous attempts to create an invisible clothing. Previously, scientists have been trying to change the direction of the rays of light to surround the object, and does not reflect off it by the volume of the metamaterial. New invisibility cloak is made using a technique through which light waves are not reflected from the surface and are therefore not visible to the human eye.


"When the light waves from the tissue and the object intersect, they lose energy, therefore, an effect of invisibility" — said study co-author from the University of Texas Andre Alu.

In a laboratory experiment Alu and his colleagues were able to make the invisible 18-centimeter cylindrical rod with light microwaves. Researchers claim that using this technology you can "hide" objects of almost any shape.

"The advantage of this technology over current is that it is easy to use and improvement of — say scientists. — We have shown that the bulk metamaterial is not necessary to stop the waves of light — you just use a simple and comfortable material metaekrana. In fact, metaekrany create and easier to use than the metamaterial. The size of objects that can "hide" is comparable to the wavelength, so when using the optical frequency can actually prevent light scattering only microscopic objects. "

This invention will not only please fans of Harry Potter and spy equipment. Researchers believe that the invention can be used in the manufacture of biomedical instruments and non-contact sensors. That is, the results of research can really make a big and positive impact on the modern technology.

Translation Sergei Vasilenkova

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