Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 34: Color Centers II
Q 34.4: Vortrag
Mittwoch, 13. März 2024, 15:30–15:45, HS 1221
Quantum Non-linear Optics with Diamond Color Centers in Fiber-based Microcavities — •Julius Fischer1, Yanik Herrmann1, Julia M. Brevoord1, Colin Sauerzapf1, Leonardo G. C. Wienhoven1, Laurens J. Feije1, Matteo Pasini1, Martin Eschen1,2, Maximilian Ruf1, Matthew J. Weaver1, and Ronald Hanson1 — 1QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ Delft, The Netherlands — 2Netherlands Organisation for Applied Scientific Research (TNO), P.O. Box 155, 2600 AD Delft, The Netherlands
Quantum networks are promising for applications such as secure communication and distributed quantum computing. Diamond color center qubits like the Tin-Vacancy (SnV) center are excellent node candidates, but they have limited collectable coherent photon emission. Integration into a tunable, open microcavity can boost collection and coherent emission via the Purcell effect. We report on our results of coupling individual SnV centers to the microcavity. We achieve significant Purcell-enhancement, evidenced through lifetime reduction and linewidth broadening and demonstrate the first SnV-induced cavity transmission dip, which reaches 50 % on resonance. This effect is characterized depending on cavity detuning and probe power, and we show bunching in the photon statistics of the transmitted light. A detailed quantum optical model is used to explain the data. These results outline a key element for cavity quantum optics experiments and for efficient spin-photon interfaces.
Keywords: Microcavity; Purcell-Enhancement; Quantum Non-linear effects; Color centers; Quantum Networks