Coupling of a locally implanted rare-earth ion ensemble to a superconducting micro-resonator

I. Wisby, S. E. de Graaf, R. Gwilliam +5

We demonstrate the coupling of rare-earth ions locally implanted in a substrate (Gd${}^{3+}$ in Al${}_2$O${}_3$) to a superconducting NbN lumped-element micro-resonator. The hybrid d…