NV Diamonds for Industrial Quantum Sensing Applications

The nitrogen-vacancy (NV) center in diamond is a promising candidate for advanced quantum sensing technologies due to its outstanding properties. Achieving high-performance NV centers requires not only precise control over the NV concentration but also the use of isotopically purified diamond material. This study focuses on the fabrication of isotopically purified NV diamonds using a combination of Chemical Vapor Deposition (CVD) and Ion-Implantation methods, leveraging the NV center's intrinsic sensing capabilities for material control and optimization.<br/>Reliability and reproducibility of the created NV centers and the underlying diamond material are of high importance in order to use such materials in real-world products.<br/>The use of isotopically purified ¹²C diamond material resulted in NV centers with significantly improved spin coherence times, enhancing their sensitivity for quantum sensing applications. The integration of these high-quality NV diamonds into prototype quantum sensing devices, such as real-time spectrum analyzers is the goal of this project.<br/>Especially the creation of a pure ¹²C layers with low background fluorescence and high crystallinity with a thickness of a few hundred nanometers are of high importance. Furthermore, the development of NV-rich diamond layers, which are produced by nitrogen doping during CVD growth with subsequent electron irradiation and annealing, is another field of research with potential applications in the area of diamond quantum sensing technology.