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Q: Fachverband Quantenoptik und Photonik

Q 66: Poster – Quantum Technologies III

Q 66.28: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 2. OG

Toward a Scalable NV-Based Quantum Processor: Fiber Interconnects in Diamond Photonics — •Leon Büttner, Lara Ruppert, Christian Giese, Rebekka Eberle, and Daniel Hähnel — Fraunhofer Institute for Applied Solid State Physics, Freiburg im Breisgau, Germany

Heterogeneously integrated NV centers in photonic structures hold great promise for scalable, fiber-connected quantum information processing. We pursue a diamond-based photonic platform that combines efficient spin control, stable NV emission, and robust optical outcoupling to enable a modular, fiber-connected quantum processor. We explore strategies for vertical optical outcoupling in small-footprint NV-containing diamonds to achieve efficient, localized readout of NV centers. Together with microwave structures, this yields a modular device addressing the photonic and electronic challenges of an NV device. Fiber integration obviates the free-space optical path, creating a robust platform for quantum information processing. Future work could target heterogeneously integrating fiber-to-chip coupling, including lithographically defined spin-control structures, to drive toward a scalable NV-based quantum processor.

Keywords: NV Centers; Diamond photonics; Photonic integration; Fiber-to-chip coupling; Quantum information processing