Determining the position of a single spin relative to a metallic nanowire

TL;DR

This paper demonstrates precise nanoscale localization of individual NV centers near a metallic nanowire, enabling advanced quantum device fabrication and spin positioning with high accuracy using magnetic field measurements.

Contribution

The study introduces a method to determine the position of single spins relative to nanostructures with approximately 10 nm accuracy using NV centers as vector magnetometers.

Findings

Achieved ~10 nm localization accuracy of NV centers near nanowires.

Demonstrated use of NV centers for magnetic field sensing of passing currents.

Fabricated arrays of NV centers for potential quantum device applications.

Abstract

The nanoscale localization of individual paramagnetic defects near an electrical circuit is an important step for realizing hybrid quantum devices with strong spin-microwave photon coupling. Here, we demonstrate the fabrication of an array of individual NV centers in diamond near a metallic nanowire deposited on top of the substrate. We determine the relative position of each NV center with $\sim$10\,nm accuracy, using it as a vector magnetometer to measure the field generated by passing a dc current through the wire.