Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers
- School of Physics M013, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009 (Australia)
We demonstrate theoretically a ∼350-fold local enhancement of the intensity of the in-plane microwave magnetic field in multilayered structures made from a magneto-insulating yttrium iron garnet (YIG) layer sandwiched between two non-magnetic layers with a high dielectric constant matching that of YIG. The enhancement is predicted for the excitation regime when the microwave magnetic field is induced inside the multilayer by the transducer of a stripline Broadband Ferromagnetic Resonance (BFMR) setup. By means of a rigorous numerical solution of the Landau-Lifshitz-Gilbert equation consistently with the Maxwell's equations, we investigate the magnetisation dynamics in the multilayer. We reveal a strong photon-magnon coupling, which manifests itself as anti-crossing of the ferromagnetic resonance magnon mode supported by the YIG layer and the electromagnetic resonance mode supported by the whole multilayered structure. The frequency of the magnon mode depends on the external static magnetic field, which in our case is applied tangentially to the multilayer in the direction perpendicular to the microwave magnetic field induced by the stripline of the BFMR setup. The frequency of the electromagnetic mode is independent of the static magnetic field. Consequently, the predicted photon-magnon coupling is sensitive to the applied magnetic field and thus can be used in magnetically tuneable metamaterials based on simultaneously negative permittivity and permeability achievable thanks to the YIG layer. We also suggest that the predicted photon-magnon coupling may find applications in microwave quantum information systems.
- OSTI ID:
- 22410213
- Journal Information:
- Journal of Applied Physics, Vol. 117, Issue 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Nonlinear dynamics of three-magnon process driven by ferromagnetic resonance in yttrium iron garnet
Control of magnon–photon coupling by spin torque
Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COUPLING
DIELECTRIC MATERIALS
EXCITATION
FERRITE GARNETS
FERROMAGNETIC RESONANCE
IRON OXIDES
LAYERS
MAGNETIC FIELDS
MAGNETIZATION
MAGNONS
METAMATERIALS
MICROWAVE RADIATION
NUMERICAL ANALYSIS
NUMERICAL SOLUTION
PERMITTIVITY
PHOTONS
QUANTUM INFORMATION
TRANSDUCERS
YTTRIUM COMPOUNDS