Hannover 2020 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Posters: Quantum Optics and Photonics IV

Q 54.48: Poster

Donnerstag, 12. März 2020, 16:30–18:30, Empore Lichthof

Towards a coherent spin photon interface for quantum repeaters using color centers in diamond — •Maximilian Pallmann¹, Jonathan Körber¹, Rainer Stöhr², Evgenij Vasilenko¹, and David Hunger¹ — ¹Karlsruher Institut für Technologie — ²Universität Stuttgart

Building a long distance quantum network is one of the big challenges in the field of quantum communication, which requires the development of a quantum repeater. A crucial component of this is an efficient, coherent spin-photon interface, and coupling single color centers in diamond to a microcavity is a promising approach therefor. In our experiment, we integrate a diamond membrane to an open access fiber-based Fabry-Perot microcavity to attain emission enhancement of color centers into a single well-collectable mode as well as spectral filtering. Simulations predict the feasibility of a strong enhancement of the ZPL emission efficiency, reaching values of up to 80% for NV centers. We present a spatially resolved characterization of a coupled cavity-membrane device and report on the current status of the experiment.