Mainz 2026 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 58: Quantum Technologies – Color Centers I
Q 58.6: Talk
Thursday, March 5, 2026, 15:45–16:00, P 5
Towards large-scale characterization of color centers in diamond through automated photoluminescence excitation measurements — •Marie L. Sturm1, Maarten H. van der Hoeven1, Malo Bézard1, 2, Julian M. Bopp1, 2, and Tim Schröder1, 2 — 1Department of Physics, Humboldt-Universität zu Berlin, 12489 Berlin, Germany — 2Ferdinand-Braun-Institut (FBH), Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany
Spectrally indistinguishable single-photon emitters are a fundamental requirement for generating entanglement in photonic quantum networks. Identifying such emitters demands precise knowledge of their optical transition frequencies and linewidths.
We demonstrate a scalable characterization approach for color centers in diamond based on automated photoluminescence-excitation (PLE) spectroscopy. A large-scale characterization capability can be enabled by full automation of the experimental control, including tuning of a continuous-wave laser with MHz frequency precision. By exciting a large field of view rather than addressing individual emitters, the overall characterization throughput can be significantly enhanced.
Using this technique, we investigate the spectral homogeneity of tin-vacancy centers in diamond. This method enables identification of spectrally indistinguishable emitters for deterministic integration into quantum devices and is applicable to various solid-state platforms, paving the way for scalable on-chip quantum-photonic architectures.
Keywords: Characterization; Color centers; Photoluminescence-excitation spectroscopy; Tunable laser; Widefield