Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 65: Quantum information: Quantum computers and communication II

Q 65.1: Vortrag

Freitag, 21. März 2014, 14:00–14:15, DO26 207

The Silicon Vacancy centre in diamond as a superb single photon source — •Lachlan Rogers, Kay Jahnke, Liam McGuinness, and Fedor Jelezko — Institut für Quantenoptik, Universität Ulm, Ulm, Germany 89081

The negatively charged silicon-vacancy (SiV) colour centre in diamond shows promise as a single photon source for quantum communications and flying-qubit information processing. Often these technologies demand that individual photons are indistinguishable, and scalability requires that this condition even applies to photons from multiple emitters. Typical solid-state single photon sources require tuning to improve spectral overlap between distinct emitters, but we have observed SiV centres which intrinsically show almost identical emission (spectral overlap of up to 83%) and near transform-limited excitation linewidths. Recent developments in understanding the fundamental physics of SiV make it possible to tentatively explain why this colour centre is such a superb single photon source.