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Q: Fachverband Quantenoptik und Photonik
Q 60: Quantum Information II
Q 60.13: Poster
Thursday, March 17, 2022, 16:30–18:30, P
Towards a quantum memory on a silicon chip — •Stephan Rinner1, Lorenz Weiss1, Andreas Gritsch1, Johannes Früh1, 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
For the implementation of large-scale quantum networks Erbium dopants are promising candidates 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 made in previous studies, we have shown that erbium ions implanted into silicon nanostructures can be integrated at well-defined lattice sites with narrow inhomogeneous (∼1 GHz) and homogeneous (<0.1 GHz) linewidths. By optimizing the implantation conditions and by using high-purity silicon-on-insulator samples, we have recently decreased the homogeneous linewidth down to 20 kHz at 2 K. These improvements are a crucial step towards the implementation of coherent storage of light in a scalable physical platform. We will present recent results in spectroscopy and give an outlook on realizing a silicon based on-chip quantum memory operated at telecom wavelength.