Three-dimensional magnetic resonance tomography with sub-10 nanometer resolution

TL;DR

This paper presents a method for three-dimensional magnetic resonance tomography achieving a resolution of approximately 6 nanometers, enabling detailed imaging of NV centers in diamond with potential applications in structural analysis.

Contribution

The authors demonstrate sub-10 nanometer resolution in 3D magnetic resonance tomography using lithographically fabricated microwires and introduce a compressed sensing scheme for efficient imaging from undersampled data.

Findings

Achieved 5.99 nm resolution in 3D magnetic resonance tomography.

Developed a compressed sensing approach for faster imaging.

Enabled direct visualization of localized spin ensembles.

Abstract

We demonstrate three-dimensional magnetic resonance tomography with a resolution down to 5.99 +- 0.07 nm. Our measurements use lithographically fabricated microwires as a source of three-dimensional magnetic field gradients, which we use to image NV centers in a densely doped diamond by Fourier-accelerated magnetic resonance tomography. We also present a compressed sensing scheme for imaging of a spatially localized ensemble from undersampled data, which allows for a direct visual interpretation without numerical optimization. The resolution achieved in our work approaches the positioning accuracy of site-directed spin labeling, paving the way to three-dimensional structure analysis by magnetic-gradient based tomography.