Journal
PHYSICAL REVIEW LETTERS
Volume 110, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.110.167402
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Funding
- Deutsche Forschungsgesellschaft [FOR 1482, FOR 1493, SFB/TR 21, SFB 716]
- European Commission EU FP7 [270197]
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In this Letter, the photoinduced switching of the single nitrogen-vacancy (NV) center between two different charge states, negative (NV-) and neutral (NV0), is studied under resonant excitation at liquid helium temperature. We show that resonant conversion of NV0 to NV- significantly improves spectral stability of the NV- defect and allows high fidelity initialization of the spin qubit. Based on density functional theory calculations a novel mechanism involving an Auger ionization of NV- and charge transfer of an electron from the valence band to NV0 is discussed. This study provides further insight into the charge dynamics of the NV center, which is relevant for quantum information processing based on an NV- defect in diamond. DOI: 10.1103/PhysRevLett.110.167402
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