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Published Online October 19, 2006
Science DOI: 10.1126/science.1133628

Reports

Submitted on August 8, 2006
Accepted on October 3, 2006

Metamaterial Electromagnetic Cloak at Microwave Frequencies

D. Schurig 1, J. J. Mock 1, B. J. Justice 1, S. A. Cummer 1, J. B. Pendry 2, A. F. Starr 3, D. R. Smith 1*

1 Department of Electrical and Computer Engineering, Duke University, Box 90291, Durham, NC 27708, USA.
2 Department of Physics, The Blacket Laboratory, Imperial College, London SW7 2AZ, UK.
3 SensorMetrix, San Diego, CA, USA.

* To whom correspondence should be addressed.
D. R. Smith , E-mail: drsmith{at}ee.duke.edu

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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