Positive Technology Journal

From CBC News

British and U.S. researchers have developed a cloak that renders the wearer invisible. The shield, a set of metamaterial concentric rings, can redirect microwave beams so they flow around a “hidden” object inside. The cloak is designed for operation over a band of microwave frequencies, and works only in two dimensions.

Metamaterial Electromagnetic Cloak at Microwave Frequencies.

Authors: D. Schurig, J.J. Mock, B.J. Justice, S.A. Cummer, J.B. Pendry, A.F. Starr, D.R. Smith.
Science DOI: 10.1126/science.1133628

Recently published theory has suggested that a cloak of invisibility is in principle possible, at least over a narrow frequency band. We present here the first practical realization of such a cloak: in our demonstration, a copper cylinder is 'hidden' inside a cloak constructed according to the previous theoretical prescription. The cloak is constructed using artificially structured metamaterials, designed for operation over a band of microwave frequencies. The cloak decreases scattering from the hidden object whilst at the same time reducing its shadow, so that the cloak and object combined begin to resemble free space.