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Optimizing Magnetic Force Microscopy Resolution and Sensitivity to Visualize Nanoscale Magnetic Domains
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Nanoscale Electrometry Based on a Magnetic-Field-Resistant Spin Sensor
Rui Li1,2,3, Fei Kong1,2,3, Pengju Zhao1,2,3
1Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, 230026, China.
Physical Review Letters
|July 9, 2020
Summary
This study introduces a new method using continuous dynamic decoupling to make nitrogen-vacancy (NV) centers robust sensors for electric fields, overcoming magnetic field interference for precise measurements.
Area of Science:
- Quantum sensing
- Atomic-scale spin sensing
- Electrometry
Background:
- Nitrogen-vacancy (NV) centers are promising atomic-scale spin sensors.
- Their sensitivity to magnetic fields limits electric field sensing.
- A method to isolate electric field sensitivity is needed.
Purpose of the Study:
- To develop a robust electrometric method for NV centers.
- To overcome magnetic field susceptibility in electric field sensing.
- To quantitatively investigate electric noise near diamond surfaces.
Main Methods:
- Utilizing continuous dynamic decoupling (CDD) technique.
- Operating the NV center in a dressed frame resistant to magnetic fields.
- Measuring dephasing rates between dressed states to isolate electric noise.
Main Results:
- The proposed method renders the NV center resistant to magnetic fields while maintaining electric field sensitivity.
- Electric noise near the diamond surface was successfully isolated.
- An unambiguous relation between dephasing rate and liquid dielectric permittivity was observed.
Conclusions:
- The CDD technique provides a robust approach for electric field sensing with NV centers.
- This method enables quantitative investigation of surface electric noise.
- The findings pave the way for improved electric field metrology using quantum sensors.
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