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 Bézard^{1, 2}, Julian M. Bopp^{1, 2}, and Tim Schröder^{1, 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