|Title||One-way glass for microwaves using nonreciprocal metamaterials|
|Publication Type||Journal Article|
|Year of Publication||2014|
|Authors||A. Degiron, D.R. Smith|
|Journal||Physical Review E|
We introduce a class of nonreciprocal metamaterials based on composite assemblies of metallic and biased ferrimagnetic elements. We show that such structures act as ultrathin one-way glasses due to the competition between two modes at the surface of the ferrimagnetic elements-a low-loss surface wave that transmits the signal on the other side of the structure and a surface spin-wave resonance that produces strong isolation levels. These findings can be adapted to existing metamaterial geometries, offering a blueprint to achieve unidirectional propagation in a variety of artificial media at radio, microwave, and millimeter wave frequencies.