Abstract
Achieving quantum-level control over electromagnetic waves, magnetisation dynamics, vibrations, and heat is invaluable for many practical applications and possible by exploiting the strong radiation-matter coupling. Most of the modern strong microwave photon-magnon coupling developments rely on the integration of metal-based microwave resonators with a magnetic material. However, it has recently been realised that all-dielectric resonators made of or containing magneto-insulating materials can operate as a standalone strongly coupled system characterised by low dissipation losses and strong local microwave field enhancement. Here, after a brief overview of recent developments in the field, I discuss examples of such dielectric resonant systems and demonstrate their ability to operate as multiresonant antennas for light, microwaves, magnons, sound, vibrations, and heat. This multiphysics behavior opens up novel opportunities for the realisation of multiresonant coupling such as, for example, photon-magnon-phonon coupling. I also propose several novel systems in which strong photon-magnon coupling in dielectric antennas and similar structures is expected to extend the capability of existing devices or may provide an entirely new functionality. Examples of such systems include novel magnetofluidic devices, high-power microwave power generators, and hybrid devices exploiting the unique properties of electrical solitons.
Highlights
Novel technologies enabling controllable and efficient interactions of electromagnetic radiation with matter are central to achieving the ambitious goal of quantum information processing1,2 with light, microwaves, magnetisation dynamics, vibrations, and heat.3–9 These technologies advance our capability to develop novel biomedical imaging modalities,10 frequency-tunable metamaterials,11,12 and radars.13,14A practicable physical system enabling strong radiationmatter interactions has to be able to exchange information with preserved coherence
In contrast to paramagnetic spins,3 in ferrimagnetic materials, exchange and dipole-dipole interactions between the spins result in a collective motion of spins, which leads to the ferromagnetic resonance (FMR)
Many of the new phenomena in the field of strong microwave photon-magnon coupling have been driven by systems based on metal microwave resonators loaded with a magnetic material
Summary
Novel technologies enabling controllable and efficient interactions of electromagnetic radiation with matter are central to achieving the ambitious goal of quantum information processing with light, microwaves, magnetisation dynamics, vibrations, and heat. These technologies advance our capability to develop novel biomedical imaging modalities, frequency-tunable metamaterials, and radars.. Innovative techniques enabling the coupling of light, sound, and heat to the magnetic material located inside a metal resonator have been demonstrated, the search remains open for alternative resonant structures In this perspective, I present an emergent approach that utilises all-dielectric resonant structures, generally called dielectric antennas, to control strongly hybridised magnon-polaritons with electrical currents, light, sound, vibrations, and heat (Fig. 1). A dielectric antenna simultaneously operates as a resonator for magnons, microwaves, light, sound, and vibrations, as well as it can be controlled with heat, electric fields, and currents This represents a shift in the existing design of strongly coupled systems and ushers new classes of devices based on a multiresonant strong coupling between, for example, photons, magnons, and phonons..
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