Graded index lenses for spin wave steering
| Autor: | V. V. Kruglyak, Thomas G. Philbin, Simon A. R. Horsley, N. J. Whitehead |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Condensed Matter - Materials Science business.industry Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Physics - Applied Physics Applied Physics (physics.app-ph) 021001 nanoscience & nanotechnology 01 natural sciences law.invention Magnetic field Lens (optics) Optics Ferromagnetism law Spin wave 0103 physical sciences 010306 general physics 0210 nano-technology business Refractive index |
| DOI: | 10.48550/arxiv.1906.09985 |
| Popis: | We use micromagnetic modeling 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 ${90}^{\ensuremath{\circ}}$ lens may be used as a beam divider. Finally, we analyze the robustness of the lenses to deviations from their ideal profiles. |
| Databáze: | OpenAIRE |
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