Hannover 2013 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 37: Laser applications: Spectroscopy
Q 37.1: Vortrag
Mittwoch, 20. März 2013, 14:00–14:15, F 142
Zeeman Effect on Single Silicon-Vacancy Color Centers in Diamond — •Christian Hepp1, Tina Müller2, Benjamin Pingault2, Victor Waselowski3, Elke Neu1, Jeronimo Maze3, Mete Atatüre2, and Christoph Becher1 — 1FR 7.2 - Experimentalphysik, Universität des Saarlandes, 66123 Saarbrücken, Germany — 2Atomic, Mesoscopic and Optical Physics Group, Cavendish Laboratory, University of Cambridge, JJ Thomson Ave, Cambridge CB3 0HE, United Kingdom — 3Faculty of Physics, Pontificia Universidad Catolica, Vicuna Mackenna 4860, Santiago 7820436, Chile
We present spectroscopic measurements of the fine structure splitting of single negatively charged silicon-vacancy color centers (SiV−) in diamond under the influence of high magnetic fields. The single centers have either been created in-situ in isolated CVD nanodiamonds on an iridium surface or, in an advanced approach, have been implanted into a high quality single crystalline diamond with solid immersion lenses fabricated by focused ion beam milling. The SiV− zero phonon line shows a four line fine structure at liquid helium temperature which is attributed to optical transitions between both split ground and excited states. In the magnetic field, the Zeeman effect splits these states further giving rise to a complex pattern of up to 16 spectral lines with varying splitting strength. We discuss this splitting using a model based on a group theoretical approach for the SiV center in trigonal symmetry, which suggests a spin state S = 1/2 and takes into account distortions due to the crystal strain present in the nanodiamonds.