Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 41: Nano-Optics I
Q 41.5: Talk
Wednesday, March 25, 2015, 15:45–16:00, B/gHS
Spin properties of the silicon-vacancy color center in diamond — •Jonas Nils Becker1, Benjamin Pingault2, Christian Hepp2, Carsten Arend1, Victor Waselowski3, Jeronimo Maze3, Mete Atatüre2, and Christoph Becher1 — 1Universität des Saarlandes, Saarbrücken, Germany — 2Cavendish Laboratory, University of Cambridge, United Kingdom — 3Pontificia Universidad Catolica de Chile, Santiago, Chile
Color centers in diamond have emerged as promising systems for quantum information processing as they can provide sufficiently long spin coherence times. We here present a detailed investigation of the electronic structure of the negatively charged silicon-vacancy (SiV) center. We examine the fluorescence properties of single SiV centers implanted in single crystalline diamond at cryogenic temperatures and in magnetic fields up to 7T. We show that the results are in good agreement with simulations obtained from a group theoretical model. This paves the way to access the spin degree of freedom of the SiV center. In a first experiment, we demonstrate spin-selective fluorescence of the SiV, probing its excited state spin. We show that our model can be extended to correctly describe this selectivity, and it allows predictions about the ground state spin properties of the center. This understanding of the spin properties is the basis for more advanced experiments such as all-optical coherent manipulation schemes. As a first step we here show the preparation of coherent superpositions of ground states by coherent population trapping.