Concurrent sensing of vector magnetic field based on diamond nitrogen-vacancy ensemble using a time-divided...

Area of Science:

• Quantum Sensing
• Materials Science
• Physics

Background:

• Diamond nitrogen-vacancy (NV) ensembles are used for vector magnetometry.
• Current vector NV magnetometers require extensive equipment, limiting compact applications.

Purpose of the Study:

• To develop a hardware-level protocol for a compact multi-axis NV magnetometer.
• To enable vector magnetic field sensing with reduced complexity and equipment.

Main Methods:

• A single microwave generation and signal detection channel is utilized.
• Resonances are monitored sequentially, measuring electron-spin frequency shifts in real-time.
• A custom control system with on-chip DDS and signal processing is employed.

Main Results:

• Achieved a vector sensitivity of approximately 14 nT/Hz on four axes simultaneously.
• Analyzed phase delays between sensing signals on different axes.
• Demonstrated a compact, hardware-level protocol for multi-axis NV magnetometry.

Conclusions:

• The developed protocol simplifies multi-axis NV magnetometry, enabling compact applications.
• The method is compatible with other techniques for performance enhancement.
• This advancement paves the way for more accessible quantum sensing technologies.