Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quantum Effects (Cavity QED)
Q 44.5: Vortrag
Mittwoch, 7. März 2018, 15:15–15:30, K 1.013
Coupling of SiV− ensemble in thin diamond membrane to fiber based microcavity — •Stefan Häußler1, Richard Waltrich1, Kerem Bray2, Fedor Jelezko1, Igor Aharonovich2, and Alexander Kubanek1 — 1Institute for Quantum Optics and Center for Integrated Science and Technology, Ulm University, D-89081 Ulm, Germany — 2School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia
On the route to the realization of various quantum technology applications like quantum repeaters solid-state quantum emitters such as color centers in diamond appear to be promising candidates. The remaining challenges like low rate of coherent photons, poor extraction efficiency out of the host material and low quantum yield especially in the case of the silicon-vacancy center can thereby be overcome using a resonant microcavity opening the possibility for a scalable use.
We show coupling of an ensemble of negatively charged silicon-vacancy (SiV−) centers located in a thin (∼ 200 nm) diamond membrane to a fiber-based microcavity at room temperature. The diamond membrane does not lead to significant scattering losses nor to formation of "diamond-like" cavity modes. Such hybrid systems enabling high cavity quality factors and at same time small mode volumes leading to improved optical properties and increased emission rate of the color centers. Further improvement of the cavity quality enables generation of photons with a high degree of indistinguishability from broadband emitter at room temperature.