Print Email Facebook Twitter Resonant Excitation and Purcell Enhancement of Coherent Nitrogen-Vacancy Centers Coupled to a Fabry-Perot Microcavity Title Resonant Excitation and Purcell Enhancement of Coherent Nitrogen-Vacancy Centers Coupled to a Fabry-Perot Microcavity Author Ruf, M.T. (TU Delft QID/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Weaver, M.J. (TU Delft QID/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) van Dam, S.B. (TU Delft QID/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Hanson, R. (TU Delft QID/Hanson Lab; TU Delft QN/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Date 2021 Abstract The nitrogen-vacancy (N-V) center in diamond has been established as a prime building block for quantum networks. However, scaling beyond a few network nodes is currently limited by low spin-photon entanglement rates, resulting from the N-V center's low probability of coherent photon emission and collection. Integration into a cavity can boost both values via the Purcell effect, but poor optical coherence of near-surface N-V centers has so far prevented their resonant optical control, as would be required for entanglement generation. Here, we overcome this challenge, and demonstrate resonant addressing of individual, fiber-cavity-coupled N-V centers, and collection of their Purcell-enhanced coherent photon emission. Utilizing off-resonant and resonant addressing protocols, we extract an enhancement of the zero-phonon line emission by a factor of up to 4, consistent with a detailed theoretical model. This model predicts that the probability of coherent photon detection per optical excitation can be increased to 10% for realistic parameters - an improvement over state-of-the art solid immersion lens collection systems by 2 orders of magnitude. The resonant operation of an improved optical interface for single coherent quantum emitters in a closed-cycle cryogenic system at T∼4 K is an important result towards extensive quantum networks with long coherence. To reference this document use: http://resolver.tudelft.nl/uuid:badc0e31-3d3d-4e96-83f1-643fa676b441 DOI https://doi.org/10.1103/PhysRevApplied.15.024049 ISSN 2331-7019 Source Physical Review Applied, 15 (2) Part of collection Institutional Repository Document type journal article Rights © 2021 M.T. Ruf, M.J. Weaver, S.B. van Dam, R. Hanson Files PDF PhysRevApplied.15.024049.pdf 3.59 MB Close viewer /islandora/object/uuid:badc0e31-3d3d-4e96-83f1-643fa676b441/datastream/OBJ/view