Erlangen 2022 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 60: Quantum Information II
Q 60.17: Poster
Donnerstag, 17. März 2022, 16:30–18:30, P
Efficient spin-photon interface for NV centers in diamond — •Kerim Köster1, Maximilian Pallmann1, Matthias Klausmann1, Jonathan Körber2, Jeremias Resch1, Jonas Grammel1, Julia Heupel3, Cyril Popov3, Rainer Stöhr2, and David Hunger1 — 1Physikalisches Institut, Karlsruher Institut für Technologie — 23. Physikalisches Institut, Universität Stuttgart — 3Institut für Nanostrukturtechnologie und Analytik, Universität Kassel
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 device is an efficient, coherent spin photon interface. Coupling color centers in diamond to a microcavity is a promising approach therefore.
In our experiment, we integrate a diamond membrane into an open access fiber-based Fabry-Perot microcavity to attain emission enhancement in a single well-collectable mode. We present our fully tunable, cryogenic cavity platform operating in a closed-cycle cryostat, and we achieve a sub-picometer mechanical stability during quiet periods.
We observe cavity-enhanced fluorescence spectra of an ensemble of shallow-implanted nitrogen vacancy centers in diamond, showing Purcell-enhancement of the zero-phonon line (ZPL). Furthermore, the emission yields temporal bunching of ZPL photons, which indicates a collective behavior in the emission process that can be attributed to superradiance.