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Subpicotesla Diamond Magnetometry

Wolf, Thomas ; Neumann, Philipp ; Nakamura, Kazuo ; Sumiya, Hitoshi ; Ohshima, Takeshi ; Isoya, Junichi ; Wrachtrup, Jörg

Physical review. X, 2015-10, Vol.5 (4), p.041001, Article 041001 [Periódico revisado por pares]

College Park: American Physical Society

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Título:
Subpicotesla Diamond Magnetometry
Autor: Wolf, Thomas ; Neumann, Philipp ; Nakamura, Kazuo ; Sumiya, Hitoshi ; Ohshima, Takeshi ; Isoya, Junichi ; Wrachtrup, Jörg
Assuntos: Color centers ; Decoupling ; Diamonds ; Electron spin ; Fluorescence ; Magnetic fields ; Magnetic measurement ; Magnetic resonance imaging ; Magnetometers ; Medical imaging ; Nitrogen ; Noise ; Noise sensitivity ; Optimization ; Pulsed lasers ; Room temperature ; Sensors ; Solid state ; Time measurement ; Vacancies ; Zeeman effect
É parte de: Physical review. X, 2015-10, Vol.5 (4), p.041001, Article 041001
Descrição: 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 N when N is the number of defects. In the present work, we use an ensemble of N∼1011 defect centers within an effective sensor volume of 8.5×10−4mm3 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/t , where t is the total measurement time. The associated photon-shot-noise-limited magnetic-field sensitivity for ac signals of f=20kHz is 0.9pT/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/Hz sensitivity.
Editor: College Park: American Physical Society
Idioma: Inglês

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Subpicotesla Diamond Magnetometry

Wolf, Thomas ; Neumann, Philipp ; Nakamura, Kazuo ; Sumiya, Hitoshi ; Ohshima, Takeshi ; Isoya, Junichi ; Wrachtrup, Jörg

College Park: American Physical Society

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