Spin-wave cloaking

Abstract

Spintronics is a fast growing new field in physics that has the potential to make a significant impact on all future electronics. It makes use of the electronic charge as well as its spin. Using this spin as a second degree of freedom will potentially increase performance and efficiency significantly. Possible information carriers can be introduced in the form of spin waves, which are periodic rotations of the spins along their original alignment. However, these spin waves can be distorted by impurities in spintronic devices. In this thesis we will use the field of transformation optics to cloak impurities from these spin waves. We will introduce anisotropies in the exchange interaction to accomplish this. By introducing a spintransfer torque in the system we will achieve almost perfect cloaking.