Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 41: Nano-Optics I
Q 41.6: Talk
Wednesday, March 25, 2015, 16:00–16:15, B/gHS
All-optical formation of coherent dark states of silicon-vacancy spins in diamond — •Benjamin Pingault1, Jonas Becker2, Carsten Schulte1, Carsten Arend2, Christian Hepp1, Tillmann Godde3, Alexander Tartakovskii3, Matthew Markham4, Christoph Becher2, and Mete Atature1 — 1Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom — 2Universitat des Saarlandes, Saarbrucken, Germany — 3Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom — 4Element Six Ltd., Global Innovation Centre, Didcot, United Kingdom
Colour centres in diamond have demonstrated a remarkable versatility for various applications in quantum information processing, magnetometry and in biological systems. Among them, the silicon-vacancy centre (SiV) is attracting an increasing attention due to its strong fluorescence into its zero-phonon line as well as its recently evidenced ground state spin, making it a potential candidate as a spin-photon interface. We here present our recent realisation of coherent population trapping on a single SiV, in which we optically create a coherent superposition of spin in the ground state. This allows us to determine for the first time a coherence time for the spin state in this system.