SAMOP 2021 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Information (joint session QI/Q)
Q 11.8: Poster
Mittwoch, 22. September 2021, 16:30–18:30, P
Coupling Erbium Dopants to Silicon Nanophotonic Structures — Andreas Gritsch1, Lorenz Weiss1, •Johannes Früh1, Stephan Rinner1, Florian Burger1, and Andreas Reiserer1,2 — 1Max-Planck-Institut für Quantenoptik, Garching, Germany — 2Munich Center for Quantum Science and Technology (MCQST), Ludwig-Maximilians-Universität, München, Germany
Erbium dopants are promising candidates for the implementation of large-scale quantum networks since they can combine second-long ground state coherence with coherent optical transitions at telecommunication wavelength. Among the potential host crystals for erbium, silicon stands out because it allows for the scalable fabrication of nanophotonic devices based on established processes of the semiconductor industry. In contrast to observations of previous studies, we have shown that erbium ions implanted into silicon nanostructures can be integrated at well-defined lattice sites with narrow inhomogeneous (-0.9ex~1 GHz) and homogeneous (<0.1 GHz) linewidths [1]. By optimizing the sample preparation, we have recently improved the homogeneous linewidth down to 20 kHz. As the long lifetime of the optically excited state (-0.9ex~0.25 ms) would limit the achievable rates, we designed and fabricated photonic crystal cavities which may reduce the lifetime by more than three orders of magnitude. This will allow us to control individual dopants, making our system a promising candidate for the implementation of distributed quantum information processing.
[1] L. Weiss, A. Gritsch, B. Merkel, and A. Reiserer, Optica, 8, 40-41(2021)