# Nanoscale Sensing Using Point Defects in Single-Crystal Diamond: Recent Progress on Nitrogen Vacancy Center-Based Sensors

## TL;DR

This paper reviews recent advances in nanoscale sensing using nitrogen vacancy centers in diamond, focusing on creating coherent NV centers near the surface and fabricating nanostructures for high-resolution imaging.

## Contribution

It provides an overview of recent progress in fabricating and utilizing NV centers for nanoscale sensing and imaging applications.

## Key findings

- Development of shallow, highly-coherent NV centers
- Fabrication of nanostructures for efficient fluorescence collection
- Enhanced nanoscale imaging capabilities

## Abstract

Individual, luminescent point defects in solids so called color centers are atomic-sized quantum systems enabling sensing and imaging with nanoscale spatial resolution. In this overview, we introduce nanoscale sensing based on individual nitrogen vacancy (NV) centers in diamond. We discuss two central challenges of the field: First, the creation of highly-coherent, shallow NV centers less than 10 nm below the surface of single-crystal diamond. Second, the fabrication of tip-like photonic nanostructures that enable efficient fluorescence collection and can be used for scanning probe imaging based on color centers with nanoscale resolution.