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Related Experiment Video

Updated: Jun 21, 2026

Compact Quantum Dots for Single-molecule Imaging

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

Compact and Fully Integrated LED Quantum Sensor Based on NV Centers in Diamond.

Jens Pogorzelski¹, Ludwig Horsthemke¹, Jonas Homrighausen²

¹Department of Electrical Engineering and Computer Science, Münster University of Applied Sciences, Stegerwaldstr. 39, D-48565 Steinfurt, Germany.

Sensors (Basel, Switzerland)

|February 10, 2024

Summary

This summary is machine-generated.

We developed a small, cost-effective quantum sensor using nitrogen vacancy (NV) centers in diamond. This integrated device enables sensitive magnetic field measurements for wider technical applications.

Keywords:

NV center diamond microcrystal integrated quantum sensor magnetometry

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Area of Science:

Quantum sensing
Solid-state physics
Nanotechnology

Background:

Quantum magnetometry using nitrogen vacancy (NV) centers in diamond offers high sensitivity.
Current NV-based sensors are often expensive and complex, limiting their practical use.

Purpose of the Study:

To develop a highly integrated, cost-effective quantum sensor based on NV centers in diamond.
To miniaturize quantum magnetometry for broader applications.

Main Methods:

Fabrication of a compact quantum sensor integrating a pump light source, photodiode, microwave antenna, and fluorescence detection.
Utilizing NV centers in diamond microcrystals for optically detected magnetic resonance (ODMR).

Main Results:

Achieved a sensitivity of 28.32 nT/√Hz, with a theoretical shot-noise limit of 2.87 nT/√Hz.
Developed one of the smallest fully integrated NV-based quantum sensors to date (6.9 × 3.9 × 15.9) mm³.
The sensor features an all-electric interface and low power consumption (~0.1W).

Conclusions:

The developed sensor is cost-effective and manufacturable in small series using generally available parts.
This miniaturized quantum magnetometer paves the way for non-laboratory and technical applications.
Enables wider adoption of quantum sensing technology beyond research settings.