Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Poster – Quantum Technologies III

Q 66.7: Poster

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

Characterization of shallow, low temperature annealed tin-vacancy centers in diamond — •Gabrielle A. Hunter-Smith, Jan Fait, Kilian Mark, Surena Fatemi, and Christoph Becher — Universität des Saarlandes, Fachrichtung Physik, Campus E2 6, 66123 Saarbrücken

Group-IV color centers in diamond are well known for their suitability as nodes within quantum networks due to their excellent spin and optical coherence. In particular the negatively charged tin-vacancy center (SnV-) has proved promising, with previous work showing that after high pressure, high temperature (HPHT) annealing, the spread of spectral peaks may be significantly reduced [1].

However, HPHT annealing is both a costly and restrictive procedure, as well as being potentially destructive to delicate surface structures, e.g. nano-photonic elements.

We here present initial investigations on shallow SnV- centers generated by focused ion beam implantation and annealing under vacuum at 1200^∘C. In particular, we consider the effects of surface terminations and etched microstructures on the surface of thin diamond samples through monitoring the emission spectra, saturation curves, and background fluorescence levels.

[1] Görlitz, J. et al, 2020 New J. Phys. 22 013048

Keywords: quantum communication; spectroscopy