  Achieving quantum-level control over electromagnetic waves, magnetisation
dynamics, vibrations and heat is invaluable for many practical application 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 behaviour 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.
