Hannover 2020 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Quantum Information (Quantum Repeater)
Q 57.7: Vortrag
Freitag, 13. März 2020, 12:45–13:00, e001
Resonant spectroscopy of erbium dopants in silicon nanophotonic waveguides — •Florian Burger1,2,3, Lorenz Weiss1,3, Andreas Gritsch1, Johannes Früh1,4, Laura Zarraoa1,5, and Andreas Reiserer1,3 — 1Max Planck Institute of Quantum Optics, Garching, Germany — 2Technical University of Munich, Germany, Department of Physics — 3Munich Center for Quantum Science and Technology (MCQST), Ludwig-Maximilians-Universität München, Germany — 4University of Applied Sciences Munich, Germany — 5Technical University of Denmark, Copenhagen, Denmark
Silicon photonics has developed into a mature technological platform that allows for rapid development cycles using standardized tools. Integrating coherent optical emitters into this platform would open unique possibilities towards implementing a scalable platform for quantum repeaters. In this context, we explore the use of erbium dopants that feature a coherent optical transition at a wavelength close to 1.5 μm, where the loss in both optical fibers and silicon waveguides is minimal. Previous experiments, targeted at laser development, used high implantation doses and off-resonant excitation by a focused laser. In contrast, the use of low-loss nanowire waveguides allows us to perform resonant spectroscopy. At cryogenic temperatures, we observe narrow optical resonances, suggesting that the erbium dopants are integrated into the crystal lattice at well-defined sites. We will present the current status of the experiment and our progress towards coherent control of individual erbium spins in silicon by embedding them into photonic crystal waveguides and cavities.