Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Poster – Quantum Technologies III

Q 66.33: Poster

Thursday, March 5, 2026, 17:00–19:00, Philo 2. OG

Optical and spin properties of highly strained silicon vacancy centers in diamond host — •Michael Gstaltmeyr¹, 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

Spin qubits in solid-state hosts are, due to their promise of scalability, candidates for the realization of quantum networks. The good spin properties of diamond paired with the optical properties of group-IV defects make them of special interest. Using highly strained silicon-vacancy centers effectively decouples the defect spin from the diamond lattice, mitigating disturbing spin dephasing at liquid-helium temperatures. To make use of this type of emitter, the optical and spin properties have to be well understood. This work presents how to create strain up to 500 GHz by bonding a diamond membrane to a DBR mirror and simulates the resulting changes in optical and coherence properties.

Keywords: Single Photons; Color Centers; Quantum Networks; Strain; Diamond