Journal article

Cryogenic platform for coupling color centers in diamond membranes to a fiber-based microcavity

M Salz, Y Herrmann, A Nadarajah, A Stahl, M Hettrich, A Stacey, S Prawer, D Hunger, F Schmidt-Kaler



We operate a fiber-based cavity with an inserted diamond membrane containing ensembles of silicon vacancy centers (SiV-) at cryogenic temperatures ≥4K. The setup, sample fabrication and spectroscopic characterization are described, together with a demonstration of the cavity influence by the Purcell effect. This paves the way towards solid-state qubits coupled to optical interfaces as long-lived quantum memories.


Awarded by Australian Research Council

Funding Acknowledgements

Open Access funding provided by Projekt DEAL. We thank Morgane Gandil, Philipp Fuchs, Elke Neu and Christoph Becher for helpful discussions as well as characterization measurements of the membrane samples. We thank Michael Kieschnick and Jan Meijer for the implantation of Si into the samples. We thank Lachlan J. Rogers and Fedor Jelezko for helpful discussions at the early stages of the experiment. We thank Kumaravelu Ganesan for assistance with membrane samples fabrication. The work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). AN is supported by the Australian Research Council via Linkage Grant LP160101515. Experiments were partly performed using the Qudi software suite [68]. MS, YH, DH and FSK acknowledge financial support by the Bundesministerium fur Bildung und Forschung via Q.Link.X. MS, YH and FSK acknowledge financial support by the VolkswagenStiftung.