量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum and Radiological Science and Technology.
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Nitrogen vacancy (NV) center in diamond is expected as a magnetic sensor with high sensitivity at room temperature and detection
of 1H spins out of the substrate by single NV center was reported [1]. For improvement of magnetic sensitivity, aligned shallow NV
ensemble is required since the magnetic sensitivity is inversely proportional to a square root of number of NV centers contributing to
the measurement [2, 3]. Delta-doping of nitrogen (N) was performed by diamond growth on N-terminated (001) diamond and estimated
2D concentration of NV centers was 1 x 1011 cm-2 [4]. This method can control the depth of NV ensemble precisely unlike ion
implantation which are popular methods to fabricate NV ensemble. However, NV centers in the (001) delta-doping layer would be not
aligned because possibility of each four sites adjacent to N becoming a vacancy are equivalent. In the case of (111) delta-doping layer,
NV centers will be aligned because a top site is more preferable to become a vacancy than other three equivalent sites. Recently, we
established the method to fabricate N-terminated diamond with high coverage without any damage on the surface [5]. We succeeded
to fabricate aligned two-dimensional NV ensemble from N-terminated (111) diamond with half mono layer coverage embedded by
high purity (111) diamond film.
会議概要（会議名, 開催地, 会期, 主催者等）
The 2nd International Forum on Quantum Metrology and Sensing (IFQMS)
Transformation of Nitrogen Adsorbed on (111) Diamond Surface into Highly Aligned 2-Dimensional NV Ensemble
