Freiburg 2019 – wissenschaftliches Programm
FM 81.4: Talk
Donnerstag, 26. September 2019, 15:00–15:15, 3042
Anisotropic CVD growth of diamond pillars for Scanning-NV-Magnetometry — •Arne Götze1,2, Christian Giese1, Volker Cimalla1, and Oliver Ambacher1,2 — 1Fraunhofer IAF, Freiburg, Germany — 2Chair for Power Electronics, INATECH, Uni Freiburg, Germany
The technique of Scanning-NV-Magnetometry promises to be a valuable tool for sciences and the industry. By fitting a diamond nanopillar containing single or multiple NV centers to an atomic force microscope, magnetic fields can be measured with high spatial resolution and sensitivity. The current method to produce these diamond tips is to perform lithography and use an oxygen plasma etch process. NV centers are created by nitrogen-ion implantation and annealing. Both of these process steps damage the diamond lattice around the NV center, whose spin coherence time and magnetic sensitivity deteriorate in consequence. By utilising anisotropic diamond growth in CVD (chemical vapour deposition) reactors we show that it is possible to create diamond pillars without introducing crystalline damage in the vicinity of the NV centers in the tip of the pillars. The properties of the resulting diamond tips, as well as limitations and opportunities of this process are discussed.