Dr. Joe Smith
University of Bristol


Dr Joe Smith is a Research Fellow in QETLabs at the University of Bristol. His research focuses on engineering photonic systems using foundry processes and nanotechnology. Specifically, he looks at large-scale quantum information processing and robust designs for quantum sensing.


Abstract:
Engineering top-down spin-photon interfaces

Scaling solid-state quantum systems has proven difficult due to the challenge of engineering efficient photonic interfaces. Our work has demonstrated that nitrogen-rich silicon nitride, with its low auto-fluorescence, is a viable platform for this. I will present our results integrating NV centres in nanodiamond with foundry and in-house silicon photonics. I will also show new results using silicon electronics to mitigate crosstalk and address individual spins of NV centres at sub-100-µm spacing. Alongside photonic and microwave interfaces, a remaining challenge is the application of large static fields; I will show how robotics can be used to define sets of vector fields in the presence of physical constraints.


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