Increased negatively charged nitrogen-vacancy centers in fluorinated diamond

We investigated the effect of fluorine-terminated diamond surface on the charged state of shallow nitrogen vacancy defect centers (NVs). Fluorination is achieved with CF4 plasma, and the surface chemistry is confirmed with x-ray photoemission spectroscopy. Photoluminescence of these ensemble NVs rev...

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Bibliographic Details
Published in:Applied physics letters 2013-07, Vol.103 (5)
Main Authors: Cui, Shanying, Hu, Evelyn L.
Format: Article
Language:English
Subjects:
CARBON TETRAFLUORIDE
CHEMISTRY
CONTROL
CRYSTALS
DIAMONDS
FLUORINATION
FLUORINE
MATERIALS SCIENCE
NITROGEN
PHONONS
PHOTOEMISSION
PHOTOLUMINESCENCE
PLASMA
QUANTUM INFORMATION
SPIN
SURFACES
VACANCIES
X RADIATION
X-RAY SPECTROSCOPY
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Summary:We investigated the effect of fluorine-terminated diamond surface on the charged state of shallow nitrogen vacancy defect centers (NVs). Fluorination is achieved with CF4 plasma, and the surface chemistry is confirmed with x-ray photoemission spectroscopy. Photoluminescence of these ensemble NVs reveals that fluorine-treated surfaces lead to a higher and more stable negatively charged nitrogen vacancy (NV−) population than oxygen-terminated surfaces. NV− population is estimated by the ratio of negative to neutral charged NV zero-phonon lines. Surface chemistry control of NV− density is an important step towards improving the optical and spin properties of NVs for quantum information processing and magnetic sensing.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4817651