Berlin 2024 – scientific programme
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QI: Fachverband Quanteninformation
QI 8: Photons and Photonic Quantum Processors
QI 8.5: Talk
Monday, March 18, 2024, 17:45–18:00, HFT-FT 131
Single erbium emitters in nanophotonic silicon resonators — •Jakob Pforr1,2, Andreas Gritsch1,2, Alexander Ulanowski1,2, Stephan Rinner1,2, Johannes Früh1,2, Florian Burger1,2, Jonas Schmitt1,2, Kilian Sandholzer1,2, Adrian Holzäpfel1,2, and Andreas Reiserer1,2 — 1Max-Planck-Institut für Quantuenoptik, 85748 Garching, Germany — 2TU München and Munich Center for Quantum Science and Technology, 85748 Garching, Germany
Erbium is a promising candidate for quantum networks, because it offers coherent optical transitions in the minimal-loss window of optical fibers. Integrating it in silicon allows for CMOS compatible fabrication and scalability. Previous work showed narrow inhomogeneous broadening (∼1 GHz) and narrow homogeneous linewidth (<0.01 MHz) in erbium ensembles [1].
We demonstrate that this can also be achieved in samples that were fabricated in a commercial nanophotonic foundry [2]. In addition, by integrating the dopants into suited resonators with Q ∼ 105 and V ∼ λ3, the optical lifetime is reduced 60-fold via Purcell-enhancement and single dopants can be observed [3].
We present our recent advances towards spin control, which demonstrate that Er:Si is a suitable spin-photon interface for quantum networks in the telecom C band.
References:
[1] Gritsch et. al. 2021. PRX 12(4): 041009.
[2] Rinner et. al. 2023. Nanophotonics 12(17): 3455-3462.
[3] Gritsch et. al. 2023. Optica 10: 783-789
Keywords: Rare-earth; Erbium; Quantumnetwork; Resonators; Foundry