Wide-field dynamic magnetic microscopy using double-double quantum driving of a diamond defect ensemble
arXiv:2002.06237 · doi:10.1103/PhysRevApplied.15.054032
Abstract
Wide-field magnetometry can be realized by imaging the optically-detected magnetic resonance of diamond nitrogen vacancy (NV) center ensembles. However, NV ensemble inhomogeneities significantly limit the magnetic-field sensitivity of these measurements. We demonstrate a double-double quantum (DDQ) driving technique to facilitate wide-field magnetic imaging of dynamic magnetic fields at a micron scale. DDQ imaging employs four-tone radio frequency pulses to suppress inhomogeneity-induced variations of the NV resonant response. As a proof-of-principle, we use the DDQ technique to image the dc magnetic field produced by individual magnetic-nanoparticles tethered by single DNA molecules to a diamond sensor surface. This demonstrates the efficacy of the diamond NV ensemble system in high-frame-rate magnetic microscopy, as well as single-molecule biophysics applications.
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- High-Fidelity Electron Spin Gates for Scaling Diamond Quantum Register
- Time-resolved diamond magnetic microscopy of superparamagnetic iron-oxide nanoparticles
- Quantum diamond microscopy with optimized magnetic field sensitivity and sub-ms temporal resolution