Bonn 2025 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 76: Nanophotonics II
Q 76.5: Vortrag
Freitag, 14. März 2025, 15:30–15:45, WP-HS
Telecom emitters in silicon slow-light waveguides — •Florian Burger1, 2, Stephan Rinner1, 2, Andreas Gritsch2, 1, Kilian Sandholzer2, 1, and Andreas Reiserer2, 1 — 1Max Planck Institute of Quantum Optics, Quantum Networks Group, 85748 Garching, Germany — 2Technical University of Munich, TUM School of Natural Sciences and Munich Center for Quantum Science and Technology (MCQST), 85748 Garching, Germany
In ground-based quantum networks, photons are exchanged via optical fibers to create entanglement between distant network nodes. To scale up these networks, efficient light-matter interfaces, which map the quantum state of a photon to that of a stationary quantum mechanical system, are required. Yet, a physical system that combines telecom wavelength emission for low-loss fiber transmission with sufficiently long coherence times for global-scale quantum links and straightforward scalability remains elusive. Here we show that erbium dopants in silicon, which fulfill these criteria [1], can be addressed individually when integrated into a photonic-crystal slow-light waveguide. Due to the broadband nature of the the slow-light effect in the waveguide, no technically involved tuning of the nanostructure is required to ensure efficient coupling. We also show how the slow-light effect modifies the lifetime of the investigated optical transition. Erbium-doped silicon slow-light waveguides could thus be a platform for robust on-chip quantum memories operating at telcom wavelengths in future quantum networks.
[1] A. Gritsch et al., 2024, arXiv:2405.05351.
Keywords: Erbium; Silicon; Quantum Networks; Photonic Crystals; Slow Light