Magnetic field imaging with NV ensembles
arXiv:1207.3339 · doi:10.1088/1367-2630/13/4/045021
Abstract
We demonstrate a method of imaging spatially varying magnetic fields using a thin layer of nitrogen-vacancy (NV) centers at the surface of a diamond chip. Fluorescence emitted by the two-dimensional NV ensemble is detected by a CCD array, from which a vector magnetic field pattern is reconstructed. As a demonstration, AC current is passed through wires placed on the diamond chip surface, and the resulting AC magnetic field patterns are imaged using an echo-based technique with sub-micron resolution over a 140 μm x 140 μm field of view, giving single-pixel sensitivity ~100 nT/\sqrt{Hz}. We discuss ongoing efforts to further improve sensitivity and potential bioimaging applications such as real-time imaging of activity in functional, cultured networks of neurons.
15 pages, 5 figures
References in corpus (13)
- High-sensitivity diamond magnetometer with nanoscale resolution
- Universal dynamical decoupling of a single solid-state spin from a spin bath
- Scanning magnetic field microscope with a diamond single-spin sensor
- Extending Quantum Coherence in Diamond
- Coherence of Nitrogen-Vacancy Electronic Spin Ensembles in Diamond
- High sensitivity magnetic imaging using an array of spins in diamond
- Strongly enhanced photon collection from diamond defect centres under micro-fabricated integrated solid immersion lenses
- Dynamical Decoupling of a single electron spin at room temperature
- Optical properties of the nitrogen-vacancy singlet levels in diamond
- Electron spin decoherence of single Nitrogen-Vacancy defects in diamond
- Realtime magnetic field sensing and imaging using a single spin in diamond
- Broadband magnetometry by infrared-absorption detection of nitrogen-vacancy ensembles in diamond
- Integrated Diamond Optics for Single Photon Detection