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Area of Science:

  • Quantum Sensing
  • Diamond Quantum Technologies
  • Solid-State Spin Physics

Background:

  • Nitrogen-vacancy (NV) centers in diamond are advanced solid-state spin quantum sensors for magnetic fields.
  • Current NV-ensemble magnetometry demands high-speed data acquisition and real-time processing.
  • Existing commercial instruments are bulky, expensive, and hinder practical, miniaturized NV magnetometry.

Purpose of the Study:

  • To develop an integrated, scalable, and cost-effective experimental system for NV-ensemble magnetometry.
  • To address the limitations of existing commercial instruments in terms of size, cost, and functionality.
  • To create a versatile platform for various quantum sensing applications.

Main Methods:

  • Designed an integrated system centered around a field-programmable-gate-array (FPGA) chip.
  • Incorporated high-speed peripherals for data acquisition, signal generation, and analysis.
  • Implemented functionalities including oscilloscopes, spectrum analyzers, and PID feedback controllers.

Main Results:

  • Demonstrated a compact and compatible NV-ensemble magnetometry system.
  • Verified system applicability through optical magnetic resonance detection, optical cavity locking, and lock-in NV magnetometry.
  • Achieved pump-enhanced magnetometry using NV centers within an optical cavity.

Conclusions:

  • The developed FPGA-based system offers a practical and miniaturized solution for NV-ensemble magnetometry.
  • The flexible design allows for convenient extension to other quantum systems, such as atomic magnetometers.
  • This integrated system enhances the practicality and accessibility of advanced quantum sensing experiments.