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Quantum sensing based on diamond NV color center and its application research
2024-01-08 09:15:07
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The nitrogen vacancy (NV) color center in diamond is an excellent solid-state single-spin system with the advantages of easy initialization and readout, controllability, and long coherence time. The NV color center in diamond is an excellent quantum sensor. Due to its unique electronic structure and stable physical properties, it has broad application prospects in the fields of quantum sensing, quantum computing, and quantum communications.
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The nitrogen vacancy (NV) color center in diamond is an excellent solid-state single-spin system with the advantages of easy initialization and readout, controllability, and long coherence time. The NV color center in diamond is an excellent quantum sensor. Due to its unique electronic structure and stable physical properties, it has broad application prospects in the fields of quantum sensing, quantum computing, and quantum communications.
Quantum precision measurement technology based on NV color center
The team of Academician Guo Guangcan of the University of Science and Technology of China and the Key Laboratory of Quantum Information of the Chinese Academy of Sciences published an article titled "A robust fiber-based quantum thermometer coupled with nitrogen-vacancy centers" in 2021, reporting on the use of nitrogen vacancies in diamond. (NV) Quantum temperature sensor at the center. This temperature sensor uses the sensitivity characteristics of the nitrogen vacancy center in diamond to different physical quantities to design an optical fiber quantum thermometer. It can effectively isolate magnetic field noise and microwave power drift to achieve temperature measurement.
This quantum thermometer uses a frequency modulation method to achieve temperature measurement by detecting the sharp tilt angle change of the optical nuclear magnetic resonance spectrum in a high-density nitrogen vacancy ensemble. Due to its simplicity and compatibility of implementation, as well as its robustness in isolating magnetic and microwave noise, this quantum thermometer was subsequently applied to surface temperature imaging of electronic chips with a sensitivity of 18 mK/Hz, enabling high-sensitivity temperature measurement in ambiguous environments. Lay the foundation.
The energy difference between the ground state and the excited state of the NV color center is affected by the magnetic field, so the magnetic field can be measured by measuring this energy difference. This measurement method has the characteristics of high sensitivity, high resolution and high spatial resolution, and can be used in fields such as biological imaging, geological exploration and basic physics research.
The energy level of the NV color center can also be affected by force and therefore can be used to measure force. This force sensing method has the characteristics of high sensitivity, high resolution and high dynamic range, and can be used to measure various mechanical quantities (such as pressure, strain, etc.).
By measuring the spectral changes of the NV color center at different temperatures, the temperature value can be derived. This method features high accuracy, high resolution, and high dynamic range and can be used in a variety of temperature measurement applications.
At present, Guoyi Quantum has developed a variety of quantum precision measurement equipment based on the diamond NV color center system, such as quantum diamond atomic force microscope, quantum diamond microscope and quantum diamond single spin spectrometer. Quantum sensing based on diamond NV color centers has the advantages of high sensitivity, high resolution and high stability, and is a very promising quantum sensing technology. With the continuous advancement of technology and the deepening of research, quantum sensing based on diamond NV color centers will be applied in more fields, bringing more possibilities to our scientific research and technological innovation.
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