Abstract
Coupling nitrogen-vacancy (NV) centers in diamonds to optical cavities is a promising way to enhance the efficiency of diamond-based quantum networks. An essential aspect of the full toolbox required for the operation of these networks is the ability to achieve the microwave control of the electron spin associated with this defect within the cavity framework. Here, we report on the fabrication of an integrated platform for the microwave control of an NV center electron spin in an open, tunable Fabry–Pérot microcavity. A critical aspect of the measurements of the cavity’s finesse reveals that the presented fabrication process does not compromise its optical properties. We provide a method to incorporate a thin diamond slab into the cavity architecture and demonstrate the control of the NV center spin. These results show the promise of this design for future cavity-enhanced NV center spin-photon entanglement experiments.
Highlights
Nitrogen-vacancy (NV) colour centers in diamonds have emerged as attractive candidates for quantum photonic applications
In order to use these emitters in quantum information protocols, a microwave control must be integrated into the cavity architecture
We have presented the fabrication of an integrated platform for microwave control in an open, high finesse Fabry–Perot microcavity enclosing a thin diamond membrane
Summary
Been realized in thin diamond slabs[29] and photonic crystal cavities,[21] this is the first demonstration of the NV center spin addressing within a framework tailored to the implementation of a tunable microcavity. The cavity consists of a dimpled fiber tip and polished fused silica plate, both coated with a highly reflective dielectric mirror stack [Fig. 1(a)]. Microwave striplines and marker arrays are fabricated on the planar mirror surface in order to locate the NV centers and address their spin within the diamond slab bonded to the mirror
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