Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster – Quantum Information Technologies (joint session Q/QI)
Q 62.16: Poster
Donnerstag, 13. März 2025, 17:00–19:00, Tent
Diamond Membrane with Strained SiV Color Centers Coupled to a Fabry-Perot Microcavity — •Robert Berghaus1, Florian Feuchtmayr1, Selene Sachero1, Gregor Bayer1, Julia Heupel2, Tobias Herzig3, Jan Meijer3, Cyril Popov2, and Alexander Kubanek1 — 1Institut für Quantenoptik, Universität Ulm — 2Institute of Nanostructure Technologies and Analytics, University of Kassel — 3Felix Bloch Institute for Solid State Physics, University Leipzig
Group IV color centers in diamond, such as silicon vacancy (SiV), are promising for quantum optics because of their optical transitions, spin access, and good coherence properties. SiV centers typically require millikelvin temperatures, but increasing the ground state splitting improves coherence, allowing operation at higher temperatures. Here, we demonstrate the integration of a single-crystal diamond membrane into a high-finesse microcavity (F = 3000), achieving significant lifetime shortening with a Purcell factor of 2.2 in a liquid helium atmosphere. Absorption and strain spectroscopy confirm enhanced ground-state splitting, paving the way for a spin-photon interface.
Keywords: Single Photons; Color Centers; Quantum Networks; Strain; Cavity