Magnon-polaron control in a surface magnetoacoustic wave resonator
arXiv:2506.09717 · doi:10.1038/s41467-025-66301-x
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 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.
References in corpus (14)
- Strongly coupled magnons and cavity microwave photons
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- Quantum magnonics: when magnon spintronics meets quantum information science
- Magnon Polarons in the Spin Seebeck Effect
- Magneto-optics in a van der Waals magnet tuned by self-hybridized polaritons
- Quantum control of a single magnon in a macroscopic spin system
- Coherent elastic excitation of spin waves
- Coherent and Dissipative Cavity Magnonics
- Chirality selective magnon-phonon hybridization and magnon-induced chiral phonons in a layered zigzag antiferromagnet
- Polaromechanics: cavity-magnon polaritons strongly coupled to phonons
- Transient Response of the Cavity-Magnon-Polariton
- Hybrid photon-phonon blockade
- Generation of gigahertz frequency surface acoustic waves in YIG/ZnO heterostructures
- Efficient spin-wave excitation by surface acoustic waves in ultra-low damping YIG/ZnO-heterostructures