Fourier magnetic imaging with nanoscale resolution and compressed sensing speed-up using electronic spins in diamond.
K AraiC BelthangadyH ZhangN Bar-GillStephen J DeVienceP CappellaroA YacobyR L WalsworthPublished in: Nature nanotechnology (2015)
Optically detected magnetic resonance using nitrogen-vacancy (NV) colour centres in diamond is a leading modality for nanoscale magnetic field imaging, as it provides single electron spin sensitivity, three-dimensional resolution better than 1 nm (ref. 5) and applicability to a wide range of physical and biological samples under ambient conditions. To date, however, NV-diamond magnetic imaging has been performed using 'real-space' techniques, which are either limited by optical diffraction to ∼250 nm resolution or require slow, point-by-point scanning for nanoscale resolution, for example, using an atomic force microscope, magnetic tip, or super-resolution optical imaging. Here, we introduce an alternative technique of Fourier magnetic imaging using NV-diamond. In analogy with conventional magnetic resonance imaging (MRI), we employ pulsed magnetic field gradients to phase-encode spatial information on NV electronic spins in wavenumber or 'k-space' followed by a fast Fourier transform to yield real-space images with nanoscale resolution, wide field of view and compressed sensing speed-up.
Keyphrases
- high resolution
- magnetic resonance imaging
- single molecule
- magnetic resonance
- atomic force microscopy
- molecularly imprinted
- high speed
- photodynamic therapy
- computed tomography
- healthcare
- physical activity
- mental health
- particulate matter
- electron microscopy
- machine learning
- optical coherence tomography
- simultaneous determination
- tandem mass spectrometry
- crystal structure
- solid phase extraction