期刊
APPLIED PHYSICS LETTERS
卷 85, 期 26, 页码 6409-6411出版社
AMER INST PHYSICS
DOI: 10.1063/1.1839274
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Using the techniques of microelectromechanical systems, we have constructed a small low-power magnetic sensor based on alkali atoms. We use a coherent population trapping resonance to probe the interaction of the atoms' magnetic moment with a magnetic field, and we detect changes in the magnetic flux density with a sensitivity of 50 pT Hz(-1/2) at 10 Hz. The magnetic sensor has a size of 12 mm(3) and dissipates 195 mW of power. Further improvements in size, power dissipation, and magnetic field sensitivity are immediately foreseeable, and such a device could provide a hand-held battery-operated magnetometer with an atom shot-noise limited sensitivity of 0.05 pT Hz(-1/2).
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