Rigorous numerical study of strong microwave photon-magnon coupling in all-dielectric magnetic multilayers

Abstract

We demonstrate theoretically a strong 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 (FMR) 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.

References in corpus (12)

• Strongly coupled magnons and cavity microwave photons
• Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
• High Cooperativity Cavity QED with Magnons at Microwave Frequencies
• Microwave Quantum Illumination
• Quantum Illumination at the Microwave Wavelengths
• Experimental realisation of quantum illumination
• Exchange Magnon-Polaritons in Microwave Cavities
• Study of strong photon-magnon coupling in a YIG-film split-ring resonant system
• Magnetic spheres in microwave cavities
• Hybrid quantum circuit with implanted erbium ions
• Hybridization of electromagnetic, spin and acoustic waves in magnetic having conical spiral ferromagnetic order
• Microwave spectral analysis by means of non-resonant parametric recovery of spin-wave signals in a thin magnetic film

Cited by in corpus (1)

• Magnetic spheres in microwave cavities