Regensburg 2025 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Micro- and Nanostructured Magnetic Materials
MA 17.4: Vortrag
Dienstag, 18. März 2025, 14:45–15:00, H18
Fabrication and characterization of freestanding magnetic nanostructures for microwave to photon transduction — •Matthias Grammer1,2, Jonny Qiu3, Sebastian Sailler4, Sebastian T. B. Goennenwein4, Matthias Althammer1,2, Stephan Geprägs1,2, Michaela Lammel4, Eva Weig3, and Hans Huebl1,2 — 1Walther-Meißner-Institut, BAdW, Garching, Germany — 2School of Natural Sciences, TUM, Garching, Germany — 3School of Computation, Information and Technology, TUM, Garching, Germany — 4Department of Physics, University of Konstanz, Konstanz, Germany
Efficient transduction between microwave and optical photons is critical for quantum network applications.
Engelhard et al. [1] proposed a trasduction scheme based on collective magnetic and elastic excitations as mediators between the microwave and the optical regime. Implementing this concept requires co-localization of microwave, magnetic and elastic excitations within a suspended microstructure resembling an optomechanical crystal (OMC).
In this presentation we present our progress towards the fabrication of a OMC based on the ferrimagnetic insulator yttrium iron garnet (YIG). To realize freely suspendend structures we explore two fabrication strategies: (i) the structuring of grown YIG/SiOx/GGG heterostructures and (ii) the integration of YIG on semiconductor substrates. We will report on fabrication aspects and the characterization of the resulting devices using e.g. scanning electron microscopy and magneto-optical Kerr effect measurements.
[1] F. Engelhardt et al., Phys. Rev. Applied 18, 044059 (2022).