Bonn 2025 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 62: Poster – Quantum Information Technologies (joint session Q/QI)

Q 62.18: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

Quantum frequency conversion device for single photons from SnV centers in diamond — •Marlon Schäfer, David Lindler, Tobias Bauer, and Christoph Becher — Universität des Saarlandes, Fachrichtung Physik, Campus E2 6, 66123 Saarbrücken

Most quantum emitters exhibit optical transitions in the visible to near-infrared spectral region. In fiber-linked quantum networks, these photons need to be converted to low-loss telecom bands at 1550 nm through nonlinear three-wave mixing in periodically-poled lithium niobate waveguides to minimize transmission losses.

To make this technology viable for real-world applications, quantum frequency converters must operate robustly outside laboratory conditions without human intervention. Here, we explore automatic beam alignment and path stabilization for a device that converts single photons from tin-vacancy (SnV) centers in diamond using a two-stage scheme. Such a two-stage scheme was recently shown to successfully circumvent pump-induced noise for the conversion of single photons from silicon-vacancy centers in diamond [1].

[1] Schäfer, M. et al., Adv. Quantum Technol. 2023, 2300228.

Keywords: quantum frequency conversion; nonlinear optics; color centers; tin-vacancy center in diamond; single photons