%0 Journal Article %1 Geng2023 %A Geng, Jianpei %A Shalomayeva, Tetyana %A Gryzlova, Mariia %A Mukherjee, Amlan %A Santonocito, Santo %A Dzhavadzade, Dzhavid %A Dasari, Durga Bhaktavatsala Rao %A Kato, Hiromitsu %A Stöhr, Rainer %A Denisenko, Andrej %A Mizuochi, Norikazu %A Wrachtrup, Jörg %D 2023 %J npj Quantum Information %K pi3 wrachtrup %N 1 %P 110 %R 10.1038/s41534-023-00777-7 %T Dopant-assisted stabilization of negatively charged single nitrogen-vacancy centers in phosphorus-doped diamond at low temperatures %U https://www.nature.com/articles/s41534-023-00777-7 %V 9 %X Charge state instabilities have been a bottleneck for the implementation of solid-state spin systems and pose a major challenge to the development of spin-based quantum technologies. Here we investigate the stabilization of negatively charged nitrogen-vacancy (NV−) centers in phosphorus-doped diamond at liquid helium temperatures. Photoionization of phosphorous donors in conjunction with charge diffusion at the nanoscale enhances NV0 to NV− conversion and stabilizes the NV− charge state without the need for an additional repump laser. The phosphorus-assisted stabilization is explored and confirmed both with experiments and our theoretical model. Stable photoluminescence-excitation spectra are obtained for NV− centers created during the growth. The fluorescence is continuously recorded under resonant excitation to real-time monitor the charge state and the ionization and recombination rates are extracted from time traces. We find a linear laser power dependence of the recombination rate as opposed to the conventional quadratic dependence, which is attributed to the photo-ionization of phosphorus atoms.

@article{Geng2023, abstract = {Charge state instabilities have been a bottleneck for the implementation of solid-state spin systems and pose a major challenge to the development of spin-based quantum technologies. Here we investigate the stabilization of negatively charged nitrogen-vacancy (NV−) centers in phosphorus-doped diamond at liquid helium temperatures. Photoionization of phosphorous donors in conjunction with charge diffusion at the nanoscale enhances NV0 to NV− conversion and stabilizes the NV− charge state without the need for an additional repump laser. The phosphorus-assisted stabilization is explored and confirmed both with experiments and our theoretical model. Stable photoluminescence-excitation spectra are obtained for NV− centers created during the growth. The fluorescence is continuously recorded under resonant excitation to real-time monitor the charge state and the ionization and recombination rates are extracted from time traces. We find a linear laser power dependence of the recombination rate as opposed to the conventional quadratic dependence, which is attributed to the photo-ionization of phosphorus atoms.}, added-at = {2024-01-09T15:04:47.000+0100}, author = {Geng, Jianpei and Shalomayeva, Tetyana and Gryzlova, Mariia and Mukherjee, Amlan and Santonocito, Santo and Dzhavadzade, Dzhavid and Dasari, Durga Bhaktavatsala Rao and Kato, Hiromitsu and St{\"o}hr, Rainer and Denisenko, Andrej and Mizuochi, Norikazu and Wrachtrup, J{\"o}rg}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/24e8f1e7897eb421d055fa1605ad6ee98/shirschmann}, day = 27, doi = {10.1038/s41534-023-00777-7}, interhash = {87e485485be936b05448203be3e917f0}, intrahash = {4e8f1e7897eb421d055fa1605ad6ee98}, issn = {2056-6387}, journal = {npj Quantum Information}, keywords = {pi3 wrachtrup}, month = oct, number = 1, pages = 110, timestamp = {2024-01-09T15:04:47.000+0100}, title = {Dopant-assisted stabilization of negatively charged single nitrogen-vacancy centers in phosphorus-doped diamond at low temperatures}, url = {https://www.nature.com/articles/s41534-023-00777-7}, volume = 9, year = 2023 }