Magnon-polaron control in a surface magnetoacoustic wave resonator

Kevin Künstle (), Yannik Kunz, Tarek Moussa, Katharina Lasinger, Kei Yamamoto, Philipp Pirro, John F. Gregg, Akashdeep Kamra and Mathias Weiler
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Kevin Künstle: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Fachbereich Physik and Landesforschungszentrum OPTIMAS
Yannik Kunz: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Fachbereich Physik and Landesforschungszentrum OPTIMAS
Tarek Moussa: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Fachbereich Physik and Landesforschungszentrum OPTIMAS
Katharina Lasinger: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Fachbereich Physik and Landesforschungszentrum OPTIMAS
Kei Yamamoto: Japan Atomic Energy Agency, Advanced Science Research Center
Philipp Pirro: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Fachbereich Physik and Landesforschungszentrum OPTIMAS
John F. Gregg: University of Oxford, Clarendon Laboratory, Department of Physics
Akashdeep Kamra: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Fachbereich Physik and Landesforschungszentrum OPTIMAS
Mathias Weiler: Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Fachbereich Physik and Landesforschungszentrum OPTIMAS

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: Abstract Strong coupling between distinct quasiparticles in condensed matter systems gives rise to hybrid states with emergent properties. We demonstrate the hybridization of confined phonons and finite-wavelength magnons, forming a magnon-polaron cavity with tunable coupling strength and spatial confinement controlled by the applied magnetic field direction. Our platform consists of a low-loss, single-crystalline yttrium iron garnet (YIG) film coupled to a zinc oxide (ZnO)-based surface acoustic wave (SAW) resonator. This heterostructure enables exceptionally low magnon-polaron dissipation rates below κ/2π

Date: 2025
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DOI: 10.1038/s41467-025-66301-x

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