We present a solid state magnetic field imaging technique using a two dimensional array of spins in diamond. The magnetic sensing spin array is made of nitrogen-vacancy (NV) centers created at shallow depths. Their optical response is used for measuring external magnetic fields in close proximity. Optically detected magnetic resonance (ODMR) is readout from a 60x60 μm field of view in a multiplexed manner using a CCD camera. We experimentally demonstrate full two-dimensional vector imaging of the magnetic field produced by a pair of current carrying micro-wires. The presented widefield NV magnetometer offers in addition to its high magnetic sensitivity of 20 nT/Hz and vector reconstruction, an unprecedented spatio-temporal resolution and functionality at room temperature.
@article{arxiv.1003.3526,
title = {High sensitivity magnetic imaging using an array of spins in diamond},
author = {Steffen Steinert and Florian Dolde and Philipp Neumann and Andrew Aird and Boris Naydenov and Gopalakrishnan Balasubramanian and Fedor Jelezko and Joerg Wrachtrup},
journal= {arXiv preprint arXiv:1003.3526},
year = {2010}
}