Design and low-temperature characterization of a tunable microcavity for diamond-based quantum networks
S. Bogdanovic (TU Delft - QID/Hanson Lab)
S.B. van Dam (TU Delft - QID/Hanson Lab)
Cristian Bonato (TU Delft - QID/Hanson Lab)
A.M.J. Zwerver (TU Delft - QCD/Vandersypen Lab)
B.J. Hensen (TU Delft - QID/Hanson Lab)
M.S.Z. Liddy (University of Waterloo)
Thomas Fink (ETH Zürich)
A.A. Reiserer (TU Delft - QID/Hanson Lab)
M. Loncar (Harvard University)
R. Hanson (TU Delft - QID/Hanson Lab, TU Delft - QN/Hanson Lab)
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Abstract
We report on the fabrication and characterization of a Fabry-Perot microcavity enclosing a thin diamond membrane at cryogenic temperatures. The cavity is designed to enhance resonant emission of single nitrogen-vacancy centers by allowing spectral and spatial tuning while preserving the optical properties observed in bulk diamond. We demonstrate cavity finesse at cryogenic temperatures within the range of F ¼ 4000–12 000 and find a sub-nanometer cavity stability. Modeling shows that coupling nitrogen-vacancy centers to these cavities could lead to an increase in remote entanglement success rates by three orders of magnitude.
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