Metamaterials: Steering Light with Magnetism
Dr. Rair Macedo (School of Physics and Astronomy, University of Glasgow)

Ordered magnetic 'meta'-materials such as ferromagnets and/or antiferromagnets can have remarkable changes in their electromagnetic properties at special frequencies, knows as resonances. For example, a small change in frequency, or a small change in an applied magnetic field, can change the material from blocking electromagnetic waves to transmitting said waves. Here, I will discuss both new bulk and surface waves may emerge leading to new optical effects. Negative refraction being an example. These system also have new surface waves and an external field can make these waves highly non-reciprocal i.e., the forward and reverse waves are very different from each other. These results could be important for signal processing and devices that work across a broad frequency range, as I will also discuss.