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Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 51: Magnetism Poster B

MA 51.2: Poster

Donnerstag, 4. April 2019, 15:00–18:00, Poster C

Approaching THz spin-wave generation in optically-driven acoustic resonators — •Dennis Meyer1, Vitaly Bruchmann-Bamberg1, Jakob Walowski2, Vasily Moshnyaga1, and Henning Ulrichs11I. Physikalisches Institut, Georg-August Universität Göttingen, Germany — 2Institut für Physik, Universität Greifswald, Germany

Coherent spin-wave generation between 100 GHz and a few THz is hard to achieve with current methods which either produce incoherent or non-monochromatic spin-waves. While normally an unwanted dissipation channel in spintronics, it was already shown that magneto-elastic coupling can be exploited to generate spin currents and coherent magnetic oscillations in the low GHz regime. Here, we propose a novel design to generate THz spin waves by laser excitation of an acoustic nano oscillator magneto-elastically coupled to a ferromagnetic layer.

We acknowledge financial support by the DFG within CRC1073.

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