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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Vol. 18, Iss. 12 — Dec. 1, 2001
  • pp: 1904–1910

Optical determination of alkali metal vapor number density in the vicinity (∼10-5 cm) of cell surfaces

Kaifeng Zhao, Z. Wu, and H. M. Lai  »View Author Affiliations

JOSA B, Vol. 18, Issue 12, pp. 1904-1910 (2001)

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We describe a method for determining the number density of the alkali metal vapor by use of an evanescent wave in a single total internal reflection. The method is simple to use, and it has the following useful features: It is most suitable for determining the number density of dense (>1013 cm-3) alkali metal vapor and it permits the measurement of the alkali metal vapor number density in the vicinity (10-5 cm) of cell surfaces. Using this method, we measured the number density of Rb metal vapor in the vicinity (10-5 cm) of the cell wall in cells that contain only Rb metal and no buffer gas; we found that there is no systematic difference between the Rb number density near the surface and that in the bulk.

© 2001 Optical Society of America

OCIS Codes
(240.6490) Optics at surfaces : Spectroscopy, surface
(260.6970) Physical optics : Total internal reflection
(300.1030) Spectroscopy : Absorption
(300.6210) Spectroscopy : Spectroscopy, atomic

Kaifeng Zhao, Z. Wu, and H. M. Lai, "Optical determination of alkali metal vapor number density in the vicinity (∼10-5 cm ) of cell surfaces," J. Opt. Soc. Am. B 18, 1904-1910 (2001)

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