Magnetic dipolar modes in magnon-polariton condensates
arXiv:2104.10048 · doi:10.1080/09500340.2021.1980128
Abstract
For dipole-carrying excitations observed in a high-quality resonator, strong-coupling modes can appear as composite bosons with the spontaneous formation of quantized vortices in the condensed phase of a polariton fluid. In exciton-polaritons, in particular, it leads to sustained trapping of the emitted photon. In this paper, we show that magnon-polaritons can be realized due to magnon condensation caused by magnetic dipole-dipole interaction. In a quasi-2D ferrite disk placed in a microwave cavity, one observes quantum confinement effects of magnetic-dipolar-mode (MDM) oscillations. These modes, characterized by energy eigenstates with rotational superflows and quantized vortices, are exhibited as spinor condensates. Along with the condensation of MDM magnons in the quasi-2D disk of the magnetic insulator, electric dipole condensation is also observed. At the MDM resonances, transfer between angular momenta in the magnetic insulator and in the vacuum cavity, demonstrates generation of vortex flows with fixed handedness. This indicates unique topological properties of polariton wavefronts. One observes curved wavefronts and effects of supperradiance in microwave structures. In an environment of scattering states of microwave waveguide, EM waves can carry the topological phases of MDM resonances.
39 pages, 22 figures
References in corpus (13)
- Strongly coupled magnons and cavity microwave photons
- Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
- Exciton-polariton condensates
- High Cooperativity Cavity QED with Magnons at Microwave Frequencies
- Twisting of light around rotating black holes
- Exchange Magnon-Polaritons in Microwave Cavities
- On the torque on birefringent plates induced by quantum fluctuations
- Optical momentum and angular momentum in complex media: From the Abraham-Minkowski debate to unusual properties of surface plasmon-polaritons
- Magnetic spheres in microwave cavities
- Identification of spin wave modes strongly coupled to a co-axial cavity
- Dispersive read-out of ferromagnetic resonance for strongly coupled magnons and microwave photons
- Vortices and chirality of magnetostatic modes in quasi-2D ferrite disk particles
- Magnetic-dipolar-mode Fano resonances for microwave spectroscopy of high absorption matter