Graded index lenses for spin wave steering
Applied Physics
2019-09-11 v1 Materials Science
Abstract
We use micromagnetic modelling to demonstrate the operation of graded index lenses designed to steer forward-volume magnetostatic spin waves by 90 and 180 degrees. The graded index profiles require the refractive index to diverge in the lens center, which, for spin waves, can be achieved by modulating the saturation magnetization or external magnetic field in a ferromagnetic film by a small amount. We also show how the 90 lens may be used as a beam divider. Finally, we analyse the robustness of the lenses to deviations from their ideal profiles.
Cite
@article{arxiv.1906.09985,
title = {Graded index lenses for spin wave steering},
author = {N. J. Whitehead and S. A. R. Horsley and T. G. Philbin and V. V. Kruglyak},
journal= {arXiv preprint arXiv:1906.09985},
year = {2019}
}