Robust nano-fabrication of an integrated platform for spin control in a tunable microcavity

TL;DR

This paper presents a robust fabrication method for an integrated platform enabling microwave control of NV center electron spins within a tunable microcavity, advancing quantum network technologies.

Contribution

The authors develop a fabrication process that maintains optical cavity quality while integrating diamond NV centers for spin control in a tunable microcavity.

Findings

Successful integration of diamond slab without degrading cavity finesse

Demonstrated microwave control of NV center spins within the cavity

Potential for cavity-enhanced NV spin-photon entanglement experiments

Abstract

Coupling nitrogen-vacancy centers in diamond 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 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 microwave control of an NV center electron spin in an open, tunable Fabry-Perot 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 control of the NV center spin. These results show the promise of this design for future cavity-enhanced NV center spin-photon entanglement experiments.