Bias magnetic field output angle acquisition method, automatic control method and device
By applying an initial bias magnetic field and rotating to adjust the angle in a diamond NV color center quantum device, and combining coil current-magnetic field curve fitting, the output magnetic field of a three-dimensional Helmholtz coil is automatically controlled, solving the problems of long adjustment time and poor repeatability in the prior art, and achieving efficient acquisition of four-peak ODMR curves.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ANHUI GUOSHENG QUANTUM TECH CO LTD
- Filing Date
- 2026-04-02
- Publication Date
- 2026-06-23
AI Technical Summary
In the existing technology, the process of adjusting the magnetic field direction by manually adjusting the current of a three-dimensional Helmholtz coil relies on the engineer's experience, resulting in long adjustment time and poor repeatability, making it difficult to efficiently obtain a four-peak ODMR curve.
The bias magnetic field output angle acquisition method is adopted. An initial bias magnetic field is applied to the diamond position using a three-dimensional Helmholtz coil. The peak value of photoluminescence intensity is obtained by rotating and adjusting the magnetic field angle. Combined with coil current-magnetic field curve fitting, the required magnetic field output of the three-dimensional Helmholtz coil is automatically controlled.
This method enables the rapid and regular alignment of the magnetic field generated by the three-dimensional Helmholtz coil with the NV axis inside the diamond, obtaining a four-peak ODMR curve, improving the detection signal-to-noise ratio and reducing the settling time.
Smart Images
Figure CN121955836B_ABST