Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 59: Magnonics III
MA 59.5: Talk
Friday, March 13, 2026, 10:30–10:45, POT/0361
Magnetization dynamics in YIG optomechanical crystals — •Matthias Grammer1,2, Jonny Qiu3, Sebastian Sailler4, Sebastian T.B. Goennenwein4, Matthias Althammer1,2, Stephan Geprägs1, 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 a key requirement for future quantum network applications. Recent studies have focused on freestanding magnetic nanostructures such as optomechanical crystals (OMC) based on yttrium iron garnet (YIG). These devices allow for co-localizing magnonic, elastic and photonic exitations in a single nanostructure. While the optical properties of a YIG OMC have already been experimentally shown [1], its magnonic and phononic modes have so far only been explored through simulations.
In this talk, we present an experimental investigation of the magnetic modes in a YIG OMC. For our proof of principle study, we fabricated a non-suspended YIG OMC on a GGG substrate using sputtering and lift-off techniques. We investigate the collective magnon modes using spacially resoved micro-focused magneto-optical Kerr effect measurements and categorize the observed modes using micromagnetic simulations.
[1] A. Rashedi et al., Phys. Rev. Applied 24, 054017(2025).
Keywords: Magnon; Optomechanical crystals; YIG; Transduction