Magnon-polaron control in a surface magnetoacoustic wave resonator
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910126679523328 |
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| author | Künstle, Kevin Kunz, Yannik Moussa, Tarek Lasinger, Katharina Yamamoto, Kei Pirro, Philipp Gregg, John F. Kamra, Akashdeep Weiler, Mathias |
| author_facet | Künstle, Kevin Kunz, Yannik Moussa, Tarek Lasinger, Katharina Yamamoto, Kei Pirro, Philipp Gregg, John F. Kamra, Akashdeep Weiler, Mathias |
| contents | 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 $κ/ 2π< 1.5\;$MHz. The observed mode hybridization is well described by a phenomenological model incorporating the spatial profiles of magnon and phonon modes. Furthermore, we report the first observation of Rabi-like oscillations in a coupled SAW-spin wave system, revealing the dynamical formation of magnon-polarons in the time domain. These results establish a platform for engineering hybrid spin-acoustic excitations in extended magnetic systems and enable time-resolved studies of magnon-polaron states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_09717 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnon-polaron control in a surface magnetoacoustic wave resonator Künstle, Kevin Kunz, Yannik Moussa, Tarek Lasinger, Katharina Yamamoto, Kei Pirro, Philipp Gregg, John F. Kamra, Akashdeep Weiler, Mathias Mesoscale and Nanoscale Physics 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 $κ/ 2π< 1.5\;$MHz. The observed mode hybridization is well described by a phenomenological model incorporating the spatial profiles of magnon and phonon modes. Furthermore, we report the first observation of Rabi-like oscillations in a coupled SAW-spin wave system, revealing the dynamical formation of magnon-polarons in the time domain. These results establish a platform for engineering hybrid spin-acoustic excitations in extended magnetic systems and enable time-resolved studies of magnon-polaron states. |
| title | Magnon-polaron control in a surface magnetoacoustic wave resonator |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2506.09717 |