Eddy-Current Imaging with Nitrogen-Vacancy Centers in Diamond
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-01-30 |
| Journal | Physical Review Applied |
| Authors | Georgios Chatzidrosos, Arne Wickenbrock, Lykourgos Bougas, Huijie Zheng, Oleg Tretiak |
| Institutions | Helmholtz Institute Mainz, Lawrence Berkeley National Laboratory |
| Citations | 36 |
Abstract
Section titled āAbstractāWe demonstrate microwave-free eddy-current imaging using nitrogen-vacancy centers in diamond. By detecting the eddy-current induced magnetic field of conductive samples, we can distinguish between different materials and shapes and identify structural defects. Our technique allows for the discrimination of different materials according to their conductivity. The sensitivity of the measurements is calculated as 8$\times 10 ^{5}$,S/m,$\sqrt[]{\textrm{Hz}}$ at 3.5,MHz, for a cylindrical sample with radius $r_0$,=,1,mm and height $h$,=,0.1,mm (volume $\sim$,0.3,mm$^3$), at a distance of 0.5,mm. In comparison with existing technologies, the diamond-based device exhibits a superior bandwidth and spatial resolution. In particular, we demonstrate a flat frequency response from DC to 3.5 MHz and a spatial resolution of 348,$\pm$,2,$\mu$m.