Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 42: Posters Magnetism I

MA 42.17: Poster

Wednesday, March 18, 2020, 15:00–18:00, P3

Concept of Brillouin light scattering spectroscopy of magnons in optically-induced 2D magnetic landscapes — •Matthias R. Schweizer, Alexander J.E. Kreil, Vitaliy I. Vasyuchka, Georg von Freymann, Alexander A. Serga, and Burkard Hillebrands — Fachbereich Physik und Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

Brillouin light scattering spectroscopy (BLS) is an important tool for the investigation of spin waves (SW) and their quanta, magnons, in a wide frequency and wave vector ranges. It allows for the measurement of magnon density with high spatial and temporal resolutions.
On the other hand, it has been shown that optically induced magnetization landscapes are a powerful tool to control the propagation dynamics of externally excited spin waves. Furthermore, they can be used to propel a supercurrent spin transport in Bose-Einstein magnon condensates. Such landscapes can be created by using a spatial light modulator (SLM), which is able to project reconfigurable two-dimensional optical intensity patterns on a sample, heating it and thus forming periodic magnetization arrays and graded index structures.
We present a concept for the combination of both techniques, which results in a flexible method for the optical control and observation of two-dimensional magnon dynamics on mesoscopic and microscopic scales.
Support by SFB/TRR 173 Spin+X (project B04) is gratefully acknowledged.