Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 28: Poster – Quantum Optics

Q 28.23: Poster

Tuesday, March 3, 2026, 17:00–19:00, Philo 2. OG

Frequency Conversion of Solid-State Sources for Telecom-Band Quantum Networking — •Chao Gao, Fabrice von Chamier Gliszczinski, Elnaz Bazzazi, Roger Alfredo Kögler, Esteban Gomez Lopez, Hala Said, and Oliver Benson — Institut für Physik der Humboldt-Universität zu Berlin

Solid-state quantum emitters are promising systems for quantum communication, yet their emission wavelengths are typically far from the low-loss telecom band required for efficient transmission in quantum networks. Frequency conversion bridges this mismatch. Our previously published two-step architecture (Optics Express 33, 21650 (2025)) provides a low-noise approach for translating photons from efficient non-telecom solid-state emitters toward the telecom regime.

Here, we examine the performance of one stage of that two-step converter–a difference-frequency generation interface in a periodically poled lithium niobate waveguide–designed to be compatible with non-telecom photons from semiconductor quantum dots. We characterize its efficiency and noise behavior. This work provides a frequency-conversion interface that mediates between stationary solid-state emitters and telecom-compatible quantum networks.

Keywords: Frequency conversion; Semiconductor quantum dots; Quantum networks; Difference-Frequency Generation