Erlangen 2022 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 54: Quantum Information (Quantum Repeater)

Q 54.2: Vortrag

Donnerstag, 17. März 2022, 14:15–14:30, Q-H12

Coupling Erbium Dopants to Nanophotonic Silicon Structures — •Andreas Gritsch, Lorenz Weiss, Stephan Rinner, Johannes Früh, Florian Burger, and Andreas Reiserer — Quantum Networks Group, Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany -- Munich Center for Quantum Science and Technology (MCQST), Ludwig-Maximilians-Universität München, Fakultät für Physik, Schellingstraße 4, D-80799 München, Germany

Erbium dopants are promising candidates for the implementation of large-scale quantum networks since they can combine second-long ground state coherence [1] with coherent optical transitions at telecommunication wavelength [2].

Recent results show that erbium ions implanted into silicon nanostructures are integrated at well-defined lattice sites with narrow inhomogeneous (~1 GHz) and homogeneous (<20 kHz) linewidths and long lifetimes of the optical excited states (~0.25 ms) [3]

We proceed towards the control of individual erbium dopants by fabricating photonic crystal cavities which may reduce the lifetime by more than three orders of magnitude. This will allow us to resolve and control individual dopants, making our system a promising candidate for the implementation of distributed quantum information processing over large distances.

[1] M. Rancic, et. al., Nat. Physics, 14, 50-54 (2018), [2] B. Merkel, et. al., Phys. Rev. X 10, 041025 (2020), [3] A. Gritsch, et. al., Arxiv, 2108.05120 (2021).