Nitrogen-vacancy (NV) centers in diamond nanophotonic structures for quantum networking
Edward Chen, Massachusetts Institute of Technology
The exceptional optical and spin properties of the negatively charged nitrogen-vacancy (NV) center in diamond have led to a wide range of hallmark demonstrations ranging from super-resolution imaging to quantum entanglement, teleportation, and sensing. The solid-state environment of the NV allows us to engineer nano-structures that can enhance the properties of the NV and improve the readout and initialization fidelities of the spin. I will discuss coupling of NV centers to nanophotonic cavities, which increases the amount of coherent optical emission by a factor of 60 and is therefore useful for emission-based entanglement schemes. While our fabrication process preserves the coherence properties of the NV spin, I will also discuss the remaining fabrication challenges. Another theme which I will address is the goal to create multiple, magnetically-coupled NVs within each nano-structure, which would allow us to improve both the robustness and scalability of devices in diamond.