Quantum sensor device

The quantum sensor device with controlled nitrogen-vacancy centers in a single crystal diamond substrate addresses sensitivity and stability issues by optimizing concentration and annealing processes, enhancing magnetic field detection capabilities.

WO2026078134A1 Publication Date: 2026-04-16QUANTUMDIAMONDS GMBH
0 Cites 0 Cited by

Patent Information

Application Number
PCT/EP2025/079128
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-10-11
Filing Date
2025-10-09
Publication Date
2026-04-16

AI Technical Summary

Technical Problem

Existing quantum sensor devices using nitrogen-vacancy (NV-) centers in diamond substrates face challenges in achieving high sensitivity and stability for magnetic field measurements, particularly in terms of photoionization resistance and readout contrast.

Method used

A quantum sensor device comprising a single crystal diamond substrate with controlled concentrations of nitrogen atoms, converted into NV- centers through precise annealing, and optimized for high ODMR readout contrast and reduced photoionization, utilizing a method that includes direct temperature control during the annealing process.

Benefits of technology

The device achieves improved magnetic field measurement sensitivity and stability, with enhanced readout contrast and resistance to photoionization, enabling efficient and reliable magnetic field detection.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention refers to a quantum sensor device for measuring a magnetic field using fluorescence dependence on the magnetic field, the quantum sensor device (18) comprising a substrate made of single-crystal diamond, and nitrogen atoms in the substrate, the nitrogen atoms being partially present in the form of negatively charged nitrogen-vacancy (NV-) centres, wherein a ratio of the concentration of NV- centres to the concentration of the nitrogen atoms in the substrate is at most 14%.
Need to check novelty before this filing date? Find Prior Art