Researchers at NIST and the University of Michigan have developed a new quantum-based electric field measurement technique that could revolutionize how we measure and calibrate electric fields across a wide range of frequencies. The new method, which uses the quantum properties of atoms, can measure electric fields from 1 to 500 gigahertz and is up to 100 times more sensitive than conventional methods. One of the key advantages of this new technique is its ability to self-calibrate, improving measurement precision and potentially making traceable calibrations possible in the millimeter and sub-terahertz bands for the first time.
The technique works by using a red and blue laser to prepare atoms in a cylinder to high-energy states, which are extremely sensitive to electromagnetic fields. An antenna or other source generates an electric field, which affects the spectrum of light absorbed by the atoms. By measuring this effect, researchers can calculate the field strength. The new method has already been demonstrated for imaging applications and could have applications in measuring and optimizing compatibility in densely packaged electronics, medical imaging, and climate change research.
Keywords: Metrology, Calibration, Electric field, Atom, Sensitivity
