THE INVISIBLE CLOAK

Recently, the researchers of University of California, Berkeley have successfully made the staffs in the “invisible cloak” disappear.

Zhang Xiang (Xiang Zhang) is the University of California, Berkeley Department of Materials Science, Chief Scientist and its nano-science and engineering research center director. His researching team used silicon nano-materials to create a "cloak". The ordinary optical detection will not be able to find the items that placed in the mantle - although we are still able to see this "cloak", the items under the cloak have been "disappeared" without a trace. After exposing to a light plane, changing direction and refracting, the items in our vision vanish.

This device includes composite materials (composite metal materials, dielectric). It extraordinary "stealth" ability is more from the unique structure rather than material. They also invented the two new nano-materials which use silver and magnesium fluoride in turn to constitute fishing net into the new materials and generate from the porous alumina nano-silver line. Both materials can change the direction of light. It's an impossible character for the natural features.

Now, the invisible cloak can be operated in 1400 ~ 1800 nanometer wavelength. That is almost near-infrared part of the electromagnetic spectrum, slightly longer than light, visible to the naked eye of human. Zhang said that as the medium composition and design, the invisible cloak is easier to make and has a (coverage area) progressive expansion.

To think in an optimistic way, Researchers can create new materials in order to create a more accurate device - in other words, a real visual stealth.

In this experiment, they have already proved that the light refraction led to the principles of stealth is applicable in the two-dimensional space. The next goal is to create a cloak in the three-dimensional space and put such a device into practical use as soon as possible.