Rair Macedo of University of Glasgow

In recent years we have witnessed a growing interest in cavity-magnon-polaritons (CMPs). These are hybrid light–matter quasiparticles originating from the strong coupling between magnons and cavity photons. It is expected that by combining light and magnetism in such way, it should be possible to combine quantum information with spintronics. This emergent phenomenon, can also be employed to engineer devices including, gradient memory and radiofrequency-to-optical transducers. In order to enable more functionality in CMPs, it is particularly interesting to engineer and understand the coupling strength between elements of a hybrid system – a property which works as a measure for coherent information exchange. This coupling is strongly dependent on the field configuration within the cavity, and hence, the position at which the magnetic sample is placed. In this talk, I will discuss the importance of the field configuration within the cavity and how different polarisation states can affect the behaviour of cavity magnon polaritons. The polarisation states within different cavity geometries can affect said coupling strength and behaviour of the overall hybrid system, but it’s effect has mostly been neglected by most experiments and models in this emerging field.

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Address:School of Physics and Astronomy, Kelvin Building, Glasgow, Scotland, United Kingdom, G12 8QQ UK