Microwave

Quantum mechanics

Scattering

Metamaterial

Computer science

Tunable metamaterials

Physics

Metamaterial absorber

Optics

Metamaterial cloaking

Object (grammar)

Artificial intelligence

Cloak

Science

A recently published theory has suggested that a cloak of invisibility is in principle possible, at least over a narrow frequency band. We describe here the first practical realization of such a cloak; in our demonstration, a copper cylinder was “hidden” inside a cloak constructed according to the previous theoretical prescription. The cloak was constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies. The cloak decreased scattering from the hidden object while at the same time reducing its shadow, so that the cloak and object combined began to resemble empty space.

Metamaterial Electromagnetic Cloak at Microwave Frequencies