Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 16: Scanning probe methods II
O 16.2: Vortrag
Montag, 26. März 2012, 16:15–16:30, MA 043
Development of a Diamond-based Scanning Probe Spin Sensor with sub-nm Spatial Resolution — •Eike Oliver Schäfer-Nolte1,2, Friedemann Reinhard2, Markus Ternes1, Jörg Wrachtrup2, and Klaus Kern1 — 1Max-Planck Institut für Festkörperforschung, Stuttgart, Germany — 23. Physikalisches Institut, Universität Stuttgart, Germany
The detection of single spins with high spatial resolution is a long-standing challenge in physics. The nitrogen-vacancy (NV) center in diamond is one of the few solid-state systems where the spin state can be optically measured [1]. By attaching a nanodiamond containing this "probe spin" to the tip of an atomic force microscope a controlled coupling between the NV and nearby spins on the sample can be achieved, allowing an indirect observation of these spins via the fluorescence signal from the NV [2]. This approach provides an unprecedented sensitivity by exploiting the quantum nature of the NV spin, enabling coherent manipulation by pulsed detection schemes well known from EPR- and NMR-spectroscopy. In this case the sensitivity is limited by the coherence time of the NV, which exceeds 1ms in pure diamond [3]. This corresponds to an energy resolution on the order of kHz.
We report on our efforts developing such a Scanning Probe Spin Sensor and present details of the experimental setup along with first experimental data.
References: [1] F. Jelezko, Phys. Stat. Sol. (a) 203, 3207 (2006) [2] J.M. Taylor, Nature Physics 4, 810 (2008) [3] G. Balasubramanian, Nature Materials 8, 383 (2009)