Nanoscale microwave imaging with a single electron spin in diamond

Abstract

We report on imaging of microwave (MW) magnetic fields using a magnetometer based on the electron spin of a nitrogen vacancy center in diamond. We quantitatively image the magnetic field generated by high frequency (GHz) MW current with nanoscale resolution using a scanning probe technique. We demonstrate a MW magnetic field sensitivity in the range of a few nT/$\sqrt{\text{Hz}}$, polarization selection and broadband capabilities under ambient conditions and thereby establish the nitrogen vacancy center a versatile and high performance tool for the detection of MW fields. As a first application of this scanning MW detector, we determine the MW current density in a stripline and demonstrate a MW current sensitivity of a few nA/$\sqrt{\text{Hz}}$

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• Nanoscale Sensing Using Point Defects in Single-Crystal Diamond: Recent Progress on Nitrogen Vacancy Center-Based Sensors
• Non-Invasive Imaging Method of Microwave Near Field Based on Solid State Quantum Sensing
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