Dresden 2026 – scientific programme
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MA: Fachverband Magnetismus
MA 48: Magnonics II
MA 48.10: Talk
Thursday, March 12, 2026, 17:30–17:45, HSZ/0004
Avoided Crossings of Magnon Modes and Superconducting Lumped Element Resonator in YIG Microplatelet — •Seth W. Kurfman1, Anoop Kamalasanan1, Karl Heimrich1, Philipp Geyer1, Frank Heyroth2, Kwangyul Hu3, Tharnier Puel3, Michael Flatté3,4, and Georg Schmidt1,2 — 1Martin Luther Universität Halle-Wittenberg Institut für Physik, Halle, Germany — 2Interdisziplinäres Zentrum für Materialwissenschaften, Halle, Germany — 3University of Iowa Department of Physics and Astronomy, Iowa City, Iowa (USA) — 4Eindhoven University of Technology Department of Applied Physics, Eindhoven, The Netherlands
Yttrium iron garnet (YIG) has been considered for decades as a gold standard material for magnonics due to its low-loss magnonic properties, and has successfully been used to demonstrate strong-coupling in macroscopic device geometries [1-4]. However, strong coupling of magnons in truly sub-10 micron YIG structures to date has not yet been realized. Here, we demonstrate the use of a YIG microplatelet placed on superconducting lumped element LC resonator to achieve strong coupling between numerous magnon modes and the LC resonator photons. These experimental findings are qualitatively backed by micromagnetic simulations and analytical calculations to identify the magnon modes corresponding to the experimentally observed anti-crossings in the microwave transmission signal.
[1] Lachance-Quirion, et al., Appl. Phys. Express 12, 070101 (2019). [2] Zhang, et al. Phys. Rev. Lett. 113, 156401 (2014). [3] Tabuchi et al. PRL 113, 083602 (2014). [4] Huebl, et al., PRL 111, 127003 (2013).
Keywords: YIG; strong coupling; magnon-photon coupling