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Submitted on August 8, 2006 Metamaterial Electromagnetic Cloak at Microwave Frequencies
1 Department of Electrical and Computer Engineering, Duke University, Box 90291, Durham, NC 27708, USA. * To whom correspondence should be addressed.
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.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)