DP-QUANT1 can be employed to image microwave (MW) currents with nanometric spatial resolution.

In the following work, a high frequency (GHz) MW current flows in a prototype electronic circuit. The magnetic field generated by the current is imaged quantitatively with a shot noise limited sensitivity of 680 nT/Hz1/2and deep sub-wavelength spatial resolution (10-6 * signal wavelength).

P. Apple et al., Nanoscale microwave imaging with a single electron spin in diamond, New Journal of Physics 17, 112001 (2015).
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