May 25, 2012 6:34
The sensational discovery of the world of science has made a Russian scientist from Ulyanovsk. Professor of quantum and optical electronics of the Ulyanovsk State University Oleg Gadomskii patented a way to make things invisible. Opening as stated in the patent "Method of conversion of optical radiation."
Know-how is based on the behavior of light and reflection of objects. Grätzel from Ulyanovsk preceded by many years of Experiments with gold nanoparticles.
"The invisible until you can do only a fixed object. At movement of the radiation frequency changes, and save the invisibility impossible "when creating ultrafine layer of microscopic colloidal gold particles located behind the object becomes invisible to the observer. Invisible until you can do only a fixed object. At movement of the radiation frequency changes, and save the invisibility impossible. But soon it will be possible to do, and a cap of invisibility and a magic cloak of Harry Potter, said the scientist, "Interfax".
However, the world is not the first time that scientists managed to achieve some progress in this area. For example, in March 2005, two American scientists have also stated that they are theoretically invented a technology that can make objects invisible.
Andrea Alu and Nader Ingeta the University of Pennsylvania are developing a special coating that can make objects invisible to the human eye. The researchers argue that their theory does not violate any fundamental laws of physics, but just based on previous observations of the behavior of light.
Scientists use in their model the so-called plasmons. Are quasiparticles, with which at the time was attributed to the ability of light of a certain wavelength to pass through a metal plate with holes. All previously proposed model of "stealth caps" based on the principle of a chameleon, that is, creating camouflage screens. Similar schemes have been proposed inventor Ray Alden, North Carolina (USA), and Japanese scientists from the University of Tokyo.
Technology American scientists is fundamentally different from the above ideas and basically similar to the model of the Russian scientist. Their model is based on the concept of a sharp decline in light scattering. We see things around them by reflected light. If somehow prevent this process, the object becomes invisible.
Alu and Ingeta suggest to use for this "plasmon" coating that would resonate with the frequency of the reflected light. The dielectric constant of these materials must be very low or even negative. Calculations scientists show that spherical and cylindrical objects coated with a specially developed material does not reflect almost light. If on such devices to direct light of a certain wavelength, their apparent size is reduced to such an extent that they almost disappear, reports the BBC.
Theoretically, this effect can be achieved only if the size of an object is equal to the wavelength of light. Therefore, today we can speak only of microscopic objects. However, scientists insist that their proposed technology now can be widely used in various fields. Suppose, for the development blikopodavlyayuschih materials, and to increase the resolution of the microscope.
The researchers believe that large objects, such as airplanes or spaceships covered plasmon layer will disappear from the radar screen. Alu and Ingety work was published in a scientific website arXiv.
"Invisibility cloak" has long been developed and used!