Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 61: Quantum Effects (Cavity QED)

Q 61.5: Talk

Friday, March 15, 2019, 11:30–11:45, S Gr. HS Maschb.

Fiber resonator photonics platform for quantum optics applications — •Stefan Häußler, Richard Waltrich, Gregor Bayer, and Alexander Kubanek — Institut für Quantenoptik, Universität Ulm, Albert-Einstein-Allee 11, D-89081 Ulm

Solid-state quantum emitters offer one promising platform for various quantum technology applications like quantum repeaters. Especially color centers in diamond, like the negatively charged nitrogen vacancy (NV⁻) and silicon vacancy (SiV⁻) center have been extensively studied due to its outstanding spin and optical properties.
We present a light matter interface based on a high quality fiber Fabry Perot microcavity and color centers in different host materials to overcome the remaining challenges for a scalable use namely low rate of coherent photons, poor extraction efficiency out of the host material and low quantum yield. We show coupling of an SiV⁻ ensemble located in a thin (∼ 200   nm) diamond membrane and observe cavity funneling for different single photon emitters. We further investigate the different systems towards scattering losses to estimate possible Purcell enhancement in high Q resonators.