Tunable Atomic Magnetometer for Detection of Radio-Frequency Magnetic Fields
Journal Article
·
· Physical Review Letters
- Department of Physics, Princeton University, Princeton, New Jersey 08544 (United States)
We describe an alkali-metal magnetometer for detection of weak magnetic fields in the radio-frequency (rf) range. High sensitivity is achieved by tuning the Zeeman resonance of alkali atoms to the rf frequency and partially suppressing spin-exchange collisions in the alkali-metal vapor. We demonstrate magnetic field sensitivity of 2 fT/Hz{sup 1/2} at a frequency of 99 kHz with a resonance width of 400 Hz. We also derive a simple analytic expression for the fundamental limit on the sensitivity of the rf magnetometer and show that a sensitivity of about 0.01 fT/Hz{sup 1/2} can be achieved in a practical system with a measurement volume of 200 cm{sup 3}.
- OSTI ID:
- 20699285
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 95; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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