Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 75: Quantum Technologies (Solid State Systems) (joint session Q/QI)

Q 75.2: Talk

Friday, March 14, 2025, 14:45–15:00, HS I

Towards on-chip microwave to telecom transduction using erbium doped silicon — •Daniele Lopriore and Andreas Reiserer — Technical University of Munich, TUM School of Natural Sciences and Munich Center for Quantum Science and Technology, 85748 Garching

The development of a device that converts microwave to optical photons at telecommunication wavelengths would be a key enabler for communication between remote quantum computers and would pave the way for the entanglement of distant superconducting qubits. We investigate ensembles of erbium dopants that exhibit coherent microwave [1] and optical transitions [2]. They can be used as a nonlinear medium mediating an efficient Raman conversion process [3]. High efficiencies require enhancing both the microwave and the telecom transitions with high quality factor resonators. We will present our progress towards low-loss manufacturing and measurements of the spin properties in erbium-doped silicon waveguides, and give an outlook towards the transduction efficiencies achievable with our approach. [1] A. Gritsch, et al. arXiv:2405.05351 (2024). [2] A. Gritsch, et al. Phys.Rev.X 12, 041009 (2022). [3] C. O'Brien, et al. Phys.Rev.Lett. 113, 063603 (2014).

Keywords: Quantum networks; Nanophotonics; Rare-earth emitters