Controlled Surface Modification to Revive Shallow NV- Centers.
Nano Lett
; 23(7): 2563-2569, 2023 Apr 12.
Article
em En
| MEDLINE
| ID: mdl-36927005
ABSTRACT
Near-surface negatively charged nitrogen vacancy (NV) centers hold excellent promise for nanoscale magnetic imaging and quantum sensing. However, they often experience charge-state instabilities, leading to strongly reduced fluorescence and NV coherence time, which negatively impact magnetic imaging sensitivity. This occurs even more severely at 4 K and ultrahigh vacuum (UHV, p = 2 × 10-10 mbar). We demonstrate that in situ adsorption of H2O on the diamond surface allows the partial recovery of the shallow NV sensors. Combining these with band-bending calculations, we conclude that controlled surface treatments are essential for implementing NV-based quantum sensing protocols under cryogenic UHV conditions.
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MEDLINE
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Guideline
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En
Ano de publicação:
2023
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Article