Excitons are optically active bound states of an electron and hole. Since they are formed of the underlying spinful electronic states, they are well positioned to interface with the magnetic order. I focus on exciton condensates, demonstrating their magnetic noise signatures, as well as the effects of magnon-exciton coupling.

Various topological phases have been predicted in magnonic systems, but to date none has been directly observed. This can in large part be attributed to the high frequency of the topological edge states. My primary interest is to develop alternative ways to probe magnon topology, such as in non-equilibrium and through non-Hermitian control.

Plasmons are the collective excitations of the charge density, and in two-dimensional metals can be ultrafast. Importantly, plasmons can be optically accessible. I investigate their interplay with the magnetic order, to make use of their ultrafast nature for spintronics applications, demonstrating spin demons, coupling to magnons and the two-magnon continuum.