Near-infrared hybrid quantum photonic interface for 171Yb3+solid-state qubits

171Yb3+ in YVO4 is a promising candidate for building quantum networks with good optical addressability, excellent spin properties and a secondary nuclear-spin quantum register. However, the associated long optical lifetime necessitates coupling to optical resonators for faster emission of single photons and to facilitate control of single 171Yb ions. Previously, single 171Yb ions were addressed by coupling them to monolithic photonic crystal cavities fabricated via lengthy focused ion beam milling. Here, we design and fabricate a hybrid platform based on ions coupled to the evanescently decaying field of a GaAs photonic crystal cavity. For the most strongly coupled ion close to the GaAs-YVO interface, we find a 64-fold reduction in lifetime corresponding to a Purcell enhancement of 179. For an ion with a Purcell enhancement of 21, we experimentally detect and demonstrate coherent optical control. The results show a promising route toward a quantum network with 171Yb-YVO4 using a highly scalable platform that can readily be applied to other quantum emitters in the near-infrared.