Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 29: Poster – Quantum Technologies I
Q 29.5: Poster
Dienstag, 3. März 2026, 17:00–19:00, Philo 2. OG
Narrow-band bi-chromatic photon-pair source for quantum repeaters — •Henning Mollenhauer1,2, Alexander Erl1, Morten Kallevik Straume1,2, Leon Meßner2, Helen M. Chrzanowski3, and Janik Wolters1,2 — 1DLR, Institute of Space Research, Berlin — 2TUB, Institute of Physics and Astronomy, Berlin — 3HUB, Department of Physics, Berlin
Distribution of singe photons and their storage in quantum memories are essential building blocks for quantum networks. Many previous implementations of single photon creation, photon distribution, and storage in quantum memories relied on frequency conversion and/or the need for cryogenic environments. Here we report on a photon-pair source, tunable to a quantum memory, compatible with telecommunication wavelengths, and operating at room temperature. The source utilizes spontaneous parametric down-conversion for emission of photon pairs at cesium D1 and telecom C-band wavelengths. A monolithic resonator [1] funnels photon emission into spatially and spectrally well-defined, narrow-band modes with a bandwidth 23 MHz. We present performance metrics of the source and our progress on achieving single-photon storage in a quantum memory. Expanding source and memory to realize entangled state storage will determine the system*s performance for future quantum repeater schemes. [1] Mottola et al. (2020)
Keywords: SPDC; Repeater; Memory