Subpicotesla Diamond Magnetometry
Nitrogen-vacancy (NV) defect centers in diamond are promising solid-state magnetometers. Single centers allow for high-spatial-resolution field imaging but are limited in their magnetic field sensitivity. Using defect-center ensembles, sensitivity can be scaled with sqrt[N] when N is the number of d...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2015-10-01
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| Series: | Physical Review X |
| Online Access: | http://doi.org/10.1103/PhysRevX.5.041001 |
| _version_ | 1819010968659689472 |
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| author | Thomas Wolf Philipp Neumann Kazuo Nakamura Hitoshi Sumiya Takeshi Ohshima Junichi Isoya Jörg Wrachtrup |
| author_facet | Thomas Wolf Philipp Neumann Kazuo Nakamura Hitoshi Sumiya Takeshi Ohshima Junichi Isoya Jörg Wrachtrup |
| author_sort | Thomas Wolf |
| collection | DOAJ |
| description | Nitrogen-vacancy (NV) defect centers in diamond are promising solid-state magnetometers. Single centers allow for high-spatial-resolution field imaging but are limited in their magnetic field sensitivity. Using defect-center ensembles, sensitivity can be scaled with sqrt[N] when N is the number of defects. In the present work, we use an ensemble of N∼10^{11} defect centers within an effective sensor volume of 8.5×10^{-4} mm^{3} for sensing at room temperature. By carefully eliminating noise sources and using high-quality diamonds with large NV concentrations, we demonstrate, for such sensors, a sensitivity scaling as 1/sqrt[t], where t is the total measurement time. The associated photon-shot-noise-limited magnetic-field sensitivity for ac signals of f=20 kHz is 0.9 pT/sqrt[Hz]. For a total measurement time of 100 s, we reach a standard deviation of about 100 fT. Further improvements using decoupling sequences and material optimization could lead to fT/sqrt[Hz] sensitivity. |
| first_indexed | 2024-12-21T01:20:42Z |
| format | Article |
| id | doaj.art-920cd1eac07845ce88f0d0db19169d45 |
| institution | Directory Open Access Journal |
| issn | 2160-3308 |
| language | English |
| last_indexed | 2024-12-21T01:20:42Z |
| publishDate | 2015-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review X |
| spelling | doaj.art-920cd1eac07845ce88f0d0db19169d452022-12-21T19:20:40ZengAmerican Physical SocietyPhysical Review X2160-33082015-10-015404100110.1103/PhysRevX.5.041001Subpicotesla Diamond MagnetometryThomas WolfPhilipp NeumannKazuo NakamuraHitoshi SumiyaTakeshi OhshimaJunichi IsoyaJörg WrachtrupNitrogen-vacancy (NV) defect centers in diamond are promising solid-state magnetometers. Single centers allow for high-spatial-resolution field imaging but are limited in their magnetic field sensitivity. Using defect-center ensembles, sensitivity can be scaled with sqrt[N] when N is the number of defects. In the present work, we use an ensemble of N∼10^{11} defect centers within an effective sensor volume of 8.5×10^{-4} mm^{3} for sensing at room temperature. By carefully eliminating noise sources and using high-quality diamonds with large NV concentrations, we demonstrate, for such sensors, a sensitivity scaling as 1/sqrt[t], where t is the total measurement time. The associated photon-shot-noise-limited magnetic-field sensitivity for ac signals of f=20 kHz is 0.9 pT/sqrt[Hz]. For a total measurement time of 100 s, we reach a standard deviation of about 100 fT. Further improvements using decoupling sequences and material optimization could lead to fT/sqrt[Hz] sensitivity.http://doi.org/10.1103/PhysRevX.5.041001 |
| spellingShingle | Thomas Wolf Philipp Neumann Kazuo Nakamura Hitoshi Sumiya Takeshi Ohshima Junichi Isoya Jörg Wrachtrup Subpicotesla Diamond Magnetometry Physical Review X |
| title | Subpicotesla Diamond Magnetometry |
| title_full | Subpicotesla Diamond Magnetometry |
| title_fullStr | Subpicotesla Diamond Magnetometry |
| title_full_unstemmed | Subpicotesla Diamond Magnetometry |
| title_short | Subpicotesla Diamond Magnetometry |
| title_sort | subpicotesla diamond magnetometry |
| url | http://doi.org/10.1103/PhysRevX.5.041001 |
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