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Optics Letters

Optics Letters


  • Vol. 28, Iss. 13 — Jul. 1, 2003
  • pp: 1153–1155

Dark-state imaging for two-dimensional mapping of a magnetic field

Hitoshi Asahi, Koji Motomura, Ken-ichi Harada, and Masaharu Mitsunaga  »View Author Affiliations

Optics Letters, Vol. 28, Issue 13, pp. 1153-1155 (2003)

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By imaging the dark states that are due to coherent population trapping in Na atomic vapor, we have succeeded in depicting a spatially inhomogeneous magnetic field. Highly resolved dark lines represent cross sections of the surfaces of constant magnetic fields, and they agree well with the predicted hyperfine Zeeman splitting and the two-photon selection rules of the Na atom. Mapping was made two dimensionally in real time, but extension to three dimensions is straightforward. Furthermore, unlike the previous techniques based on optical pumping, this method can be used for any magnetic-field directions.

© 2003 Optical Society of America

OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(020.2930) Atomic and molecular physics : Hyperfine structure
(020.7490) Atomic and molecular physics : Zeeman effect
(270.1670) Quantum optics : Coherent optical effects
(300.6320) Spectroscopy : Spectroscopy, high-resolution
(300.6420) Spectroscopy : Spectroscopy, nonlinear

Hitoshi Asahi, Koji Motomura, Ken-ichi Harada, and Masaharu Mitsunaga, "Dark-state imaging for two-dimensional mapping of a magnetic field," Opt. Lett. 28, 1153-1155 (2003)

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