Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 76: Nanophotonics II
Q 76.3: Talk
Friday, March 14, 2025, 15:00–15:15, WP-HS
Advanced waveguide structures for quantum communication and computing in SiC — •Jonas Schmid1,2, Flavie Davidson-Marquis1,2, Nien-Hsuan Lee1,2, Sushree Swateeprajnya Behera1,2, Stephan Kucera1, and Florian Kaiser1,2 — 1Luxembourg Institute for Science and Technology, Esch-sur-Alzette, Luxembourg — 2University of Luxembourg, Esch-sur-Alzette, Luxembourg
Divacancies in silicon carbide (SiC) entail excellent quantum systems for quantum communication, based on the combination of quantum memories and photonic qubits. Significant challenges to overcome are the low efficiency of the optical interface and the integration into photonic chips. We address these issues through the optimization of the design in order to increase the efficiency of photonic circuits in SiC. Our approach involves SiC-on-insulator waveguide structures for the integration into photonic chips. With our designs, we ensure good coupling from the dipole emitter into the waveguide, as well as from the waveguide into the fiber. Further, robust and low-loss beam splitter designs are investigated. The successful implementation of this design will enable interference between divacancies on a quantum chip. This multiplexed spin-photon entanglement interface enables faster quantum communication rates.
Keywords: Single photon emitter; Waverguide on Insulator; Entenglement