Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I
MA 19.47: Poster
Dienstag, 1. April 2014, 13:00–15:30, P1
Decoherence Imaging with Nitrogen Vacancies in Diamond — •Andrea Kurz1, Anna Ermakova1, Goutam Pramanik2, Janming Cai3, Boris Naydenov1, Martin Plenio3, Tanja Weil2, and Fedor Jelezko1 — 1Institute of Quantum Optics, University Ulm, Germany — 2Institute of Organic Chemistry III, University Ulm, Germany — 3Insitute of Therotical Physics, University Ulm, Germany
The negatively charged Nitrogen Vacancy (NV-) centers in diamond are very promising candidates for magnetic field sensors[1]. NV- has an electron spin, whose state can be read out optically, shows very long coherence times and is very sensitive to proximal spins[2,3]. NV- experiences decoherence caused by a spin bath of biological systems very precisely. The effect is strongly dependent on the distance between NV- and bath. We want to measure the coherence depending on the distance of the metallo protein ferritin to the NV-, thus imaging the spin densities of the protein molecule. To bring the molecules close to the NV center in a controlled fashion, they are attached to an AFM tip, which is brought to the diamond, with NV- at a depth of 2-5nm beneath the surface. The coherence is then measured depending on the molecules position with respect to the NV-. This method is in principle applicable for any protein and thus a very promising candidate for decoherence sensing of molecules.
[1]J. Cole et.al. ,Nanotech., Vol. 20(49) (2009)[2]A. Gruber et.al., Science, Vol. 276(5321) (2009)[3]T. Staudacher et.al., Science, Vol. 339(6119) (2013)