Freiburg 2024 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 12: Quantum Communication II

Q 12.5: Vortrag

Montag, 11. März 2024, 18:00–18:15, HS 3118

Nonlinear Quantum Photonics with a Tin-Vacancy Center Coupled to a Diamond Waveguide — Matteo Pasini, Nina Codreanu, •Tim Turan, Adria Riera Moral, Christian F. Primavera, Lorenzo De Santis, Hans K. C. Beukers, Julia M. Brevoord, Christopher Waas, Johannes Borregaard, and Ronald Hanson — QuTech and Kavli Institute of Nanoscience, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands

Color-centers integrated with nanophotonic devices have emerged as a compelling platform for quantum science and technology. Here we integrate tin-vacancy centers in a fiber-coupled diamond waveguide and investigate the interaction with light at the single-photon level. We observe single-emitter-induced extinction of the transmitted light up to 25% and measure the nonlinear effect on the photon statistics.

With this system, we demonstrate fully tunable interference between the reflected single-photon field and laser light back-scattered at the fiber end. The reflected field shows a corresponding change between bunched and anti-bunched photon statistics. Furthermore, we comment on progress towards using tin-vacancy centers in diamond waveguides as efficient quantum network nodes.

Keywords: Diamond; Tin-Vacancy Center; Quantum Networks; Nanophotonics