Figure 4
From: Wide-field magnetometry using nitrogen-vacancy color centers with randomly oriented micro-diamonds
(a) Scheme of the arrangement of thin diamond layer (red), coverslip (grey), microwave and current wire (orange) with magnetic field lines (dashed magenta). \(B_{I}\) and \(B_{bias}\) denote the direction of the magnetic field vector for bias and current wire, respectively. (b) The three individual field components measured from a single diamond spot. (c) The total magnetic field value is plotted against different current intensities for a single diamond spot. (d–f) FWHM extracted from the Lorentzian fit for arbitrarily oriented diamond spots for current values -600 mA, 0 mA and 600 mA respectively. (g) Map of magnetic field strength for current set at −600 mA, 0 and 600 mA with the field strength indicated in the colorbar. The scatter points indicate the XY position of the randomly oriented micro-diamond crystal in the field-of-view. The current wire is situated to the right of the field map.
