Berlin 2024 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 9: KFM Poster Session

KFM 9.36: Poster

Montag, 18. März 2024, 18:00–20:00, Poster E

Coherent properties of ensembles of shallow NV centers with surface modifications on diamonds — •Cheng-I Ho¹, Rouven Maier², Vadim Vorobyov², Andrej Denisenko², Anke Krueger¹, and Jörg Wrachtrup² — ¹Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart — ²3rd Physics Institut, University of Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart

The negatively-charged nitrogen-vacancy center (NV-) is a defect in diamonds for quantum applications. The coherent properties of NVs and the functional groups on the surface of diamonds critically affect the applicability for quantum sensing. In this research, we attempt different preparation process to create ensembles of shallow (less than 50-nm depth) NV centers, namely ion implantation and delta doping in CVD growth. T2 relaxation time differ from one to hundreds of microseconds with different preparing strategies. We also study properties of NVs with different functional groups on the surface of diamonds. We attempt to find the optimal condition to create ensembles for NV-NMR measurements.

Keywords: diamond; surface modification; NV centers; coherent property