Coupled states of electromagnetic fields with magnetic-dipolar-mode vortices: MDM-vortex polaritons

Abstract

Under the influence of the material environment, electromagnetic fields in the near-field regime exhibit quite different nature from those in the far-field free space. A coupled state of an electromagnetic field with an electric or magnetic dipole-carrying excitation is well known as a polariton. Such a state is the result of the mixing of a photon with an excitation of a material. The most discussed types of polaritons are phonon-polaritons, exciton-polaritons, and surface plasmon-polaritons. Recently, it was shown that in microwaves strong magnon-photon coupling can be achieved due to magnetic-dipolar-mode (MDM) vortices in small thin-film ferrite disks. These coupled states can be specified as MDM-vortex polaritons. In this paper we study properties of MDM-vortex polaritons. We show that MDM-vortex polaritons are characterized by helicity behaviors. For the observed frequency splits of MDM resonances there are different-type helicities. In the split-resonance states one has or localization, or cloaking of electromagnetic fields. We analyze numerically a variety of the field topological structures of MDM-vortex polaritons and give theoretical insights into the possible origin of such topologically distinctive states. The shown properties of MDM-vortex polaritons can be useful for realization of novel microwave metamaterial structures and near-field sensing applications.

References in corpus (5)

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• Spin-orbit interaction of photons and fine splitting of levels in ring dielectric resonator
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Cited by in corpus (8)

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• Fano resonances of microwave structures with embedded magneto-dipolar quantum dots
• Magnetic-dipolar-mode Fano resonances for microwave spectroscopy of high absorption matter
• Unidirectional magnetoelectric-field multiresonant tunneling
• Microwave magnetoelectric fields: An analytical study of topological characteristics
• Quantization of magnetoelectric fields
• Azimuthally unidirectional transport of energy in magnetoelectric fields. Topological Lenz effect
• Topological magnetoelectric effects in microwave far-field radiation