Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 33: Cavity QED, QED, and Spin-Boson Systems I
Q 33.5: Vortrag
Mittwoch, 4. März 2026, 15:30–15:45, P 4
Cavity-Enhanced Spin-Photon Interface for Single Tin-Vacancy Centers in Diamond — •Andras Lauko1, Kerim Köster1, Julia Heupel2, Philipp Grasshoff2, Vladislav Bushmakin3, Michael Kieschnick4, Michael Förg5, Thomas Hümmer5, Cyril Popov2, Jörg Wrachtrup3, Jan Meijer4, and David Hunger1 — 1Karlsruher Institut für Technologie — 2Universität Kassel — 3Universität Stuttgart — 4Universität Leipzig — 5Qlibri GmbH
Building a long-distance quantum network is one of the big challenges in the field of quantum communication, which requires an efficient photonic interface for coherent spins.
Tin-vacancy centers in diamond are a rising candidate among color centers in diamond, enabling higher operating temperatures than silicon-vacancy centers and being less prone to charge noise relative to nitrogen-vacancy centers.
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 table-top dilution cryostat, and we achieve a cavity-length stability up to one picometer rms. The platform also allows for integration of a superconducting DC magnet and microwave antenna for spin manipulation.
We observe coupling between single tin-vacancy centers and a cavity mode through Purcell-enhanced emission, and cavity-enhanced extinction in transmission.
Keywords: Color center; Tin-Vacancy; SnV; Cavity