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Q: Fachverband Quantenoptik und Photonik

Q 31: Quantum Networks, Repeaters, and QKD III (joint session Q/QI)

Q 31.1: Vortrag

Mittwoch, 12. März 2025, 11:00–11:15, AP-HS

Diamond Membrane with strained SiV color centers coupled to a fabry perot microcavity — •Florian Feuchtmayr¹, Robert Berghaus¹, Selene Sachero¹, Gregor Bayer¹, Julia Heupel², Tobias Herzig³, Jan Meijer³, Cyril Popov², and Alexander Kubanek¹ — ¹Institut für Quantenoptik Universitat Ulm — ²Institute of Nanostructure Technologies and Analytics, Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel — ³Division of Applied Quantum Systems, Felix 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