Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 9: Magnonics I
MA 9.5: Vortrag
Montag, 9. März 2026, 16:00–16:15, HSZ/0004
Magnon-polaron control in a surface magnetoacoustic wave resonator — •Kevin Künstle1, Yannik Kunz1, Tarek Moussa1, Katharina Lasinger1,2, Kei Yamamoto3, Philipp Pirro1, John F. Gregg2, Akashdeep Kamra1, and Mathias Weiler1 — 1Fachbereich Physik and Landesforschungszentrum OPTIMAS, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Kaiserslautern, 67663, Germany — 2Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom — 3Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, 319-1195, Japan
We demonstrate strong coupling between confined phonons and finite-wavelength magnons, forming a magnon-polaron cavity with field-tunable coupling strength [1]. Our platform combines a low-loss YIG film with a ZnO-based surface acoustic wave (SAW) resonator, enabling exceptionally low magnon-polaron dissipation rates below κ/2π < 1.5 MHz. The observed hybridization is accurately captured by a phenomenological model including the spatial mode profiles of SAWs and spin waves. We further observe Rabi-like oscillations in the coupled SAW spin-wave system, revealing time-domain magnon-polaron formation and establishing a platform for engineered hybrid spin-acoustic excitations.
[1] K. Künstle et al., Nat. Commun. 16, 10116 (2025)
Keywords: Hybridization; Magnon; Phonon; Strong coupling; Magnon polaron