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Q: Fachverband Quantenoptik und Photonik

Q 41: Nano-Optics I

Q 41.3: Vortrag

Mittwoch, 25. März 2015, 15:15–15:30, B/gHS

Reliable optical identification of silicon isotope enables observation of nuclear spin in a silicon vacancy centre — •Andreas Dietrich¹, Mathias Metsch¹, Jan Binder¹, Kay Jahnke¹, Lachlan J. Rogers¹, Junichi Isoya², Philip Hemmer³, Alexander Kubanek¹, and Fedor Jelezko¹ — ¹Institute of Quantum Optics, University Ulm, Germany — ²National Institute for Materials Science, Namiki, Tsukuba, Ibaraki, Japan — ³Electrical & Computer Engineering Department, Texas A&M University, USA

The silicon-vacancy centre (SiV) in diamond has exceptional spectral properties for single-emitter quantum information applications. Most of the fluorescence is concentrated in a strong zero phonon line (ZPL), with a weak phonon sideband extending for 100 nm that contains several clear features. We demonstrate that a local phonon mode causes the ZPL to shift with the silicon isotope, allowing optical identification of the silicon isotope present in a single SiV centre. This is of interest for quantum information applications since only the silicon-29 isotope has nuclear spin. We have made use of this technique to observe the nuclear hyperfine splitting of silicon-29 in SiV. This was done via coherent population trapping (CPT)