Dresden 2014 – scientific programme
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MA: Fachverband Magnetismus
MA 33: Quantum information systems I (with HL/TT)
MA 33.6: Talk
Wednesday, April 2, 2014, 16:15–16:30, POT 006
Increasing the creation yield of shallow nitrogen-vacancy centers by surface plasma termination — •Christian Osterkamp1, Jochen Scharpf1, Sebastien Pezzagna2, Jan Meijer2, Thomas Diemant3, Rolf Jürgen Behm3, Boris Naydenov1, and Fedor Jelezko1 — 1Institut für Quantenoptik, Ulm University, Albert Einstein Allee 11, 89081 Ulm, Germany. — 2Institut für Experimentelle Physik II, Abteilung Nukleare Festkörperphysik, Universität Leipzig, Linnestraße 5, 04103 Leipzig, Germany. — 3Institut für Oberflächenchemie und Katalyse, Ulm University, Albert-Einstein-Allee 47, 89081 Ulm, Germany.
Single nitrogen-vacancy (NV) centers in diamond close to the crystal surface are very promising magnetic field sensors with very high sensitivity and nanometer spacial resolution. The fluorescence of single NVs can be detected and its electron spin can be polarized, read-out and manipulated at ambient conditions. Here we report the enhanced creation of very shallow (less than 3 nm below the diamond surface) NVs by using fluorine and oxygen plasma treatment. We observe a four fold increase - from 0.11 % to about 0.45 % in the production yield when the sample surface is terminated with fluorine or oxygen atoms [1]. This effect is explained by the stabilization of the NV's negative charge state which is influenced by the various impurities present on the diamond surface.
[1]: Osterkamp et al., Appl. Phys. Lett. 103 (19), S.193118. (2013)