Optically controlled switching of the charge state of a single nitrogen-vacancy center in diamond at cryogenic temperatures

P. Siyushev, H. Pinto, M. Vörös, A. Gali, F. Jelezko, J. Wrachtrup

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Abstract

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.

Original languageEnglish
Article number167402
JournalPhysical review letters
Volume110
Issue number16
DOIs
Publication statusPublished - Apr 16 2013

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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