Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 9: Quantum Communication II

Q 9.3: Vortrag

Montag, 6. März 2017, 17:30–17:45, P 3

Low temperature spectroscopy of Germanium vacancy center — •Mathias H. Metsch¹, Lachlan J. Rogers¹, Aroosa Ijaz², Jan M. Binder¹, Petr Siyushev¹, and Fedor Fedor¹ — ¹Institute for Quantum Optics, Ulm University, D-89081 Germany — ²Institute of Quantum Electronics, ETH Zurich, CH-8093 Zurich

The negatively-charged Germanium vacancy (GeV) center in diamond has recently attracted interest as a quantum emitter. Systems offering a spin degree of freedom and efficient optical access are highly sought after in the quantum information processing context. Currently known color centers in diamond offer either good spin properties (Nitrogen vacancy) or good optical properties (Silicon vacancy). The GeV center in diamond has similar chemical structure to the SiV. In this talk the spectroscopy of single GeV is presented, highlighting outstanding spectral stability and brightness. Its brightness indicates a high quantum yield, making GeV even more appealing as a light matter interface than Silicon vacancy. Furthermore, preparation of a coherent superposition state is demonstrated using coherent population trapping.