Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 42: Precision Measurements and Metrology V

Q 42.1: Vortrag

Donnerstag, 11. März 2010, 10:30–10:45, A 310

NV color centers for magnetic field sensing at the nanoscale — •Friedemann Reinhard1, Eike Oliver Schäfer-Nolte1,2, Markus Ternes2, Bernhard Grotz1, Helmut Rathgen1, Gopalakrishnan Balausbramanian1, Julia Tisler1, Klaus Kern2, Fedor Jelezko1, and Jörg Wrachtrup11Universität Stuttgart, 3. Physikalisches Institut — 2Max-Planck-Institut für Festkörperforschung, Stuttgart

One of the most promising applications of the NV color center in diamond is to use it as a magnetic field sensor with sub-nanometer spatial resolution. This prospect arises from the fact that its spin sublevels are sensitive to magnetic fields, only ca. 1kHz wide and are accessible to pulsed optical-microwave precision spectroscopy. I present our work towards such a scanning probe diamond nano-magnetometer, focussing on two aspects: Firstly, the development of tailored atomic force microscopes with an efficient optical and microwave access. Secondly, the study of the surface properties of diamond, most notably of magnetic and electric noise, which presumably limits the coherence time of NV centers near the diamond surface and in nanodiamonds.

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