State-Insensitive Trapping and Guiding of Cesium Atoms Using a Two-Color Evanescent Field around a Subwavelength-Diameter Fiber

We calculate the optical potentials, i.e., the light shifts, of the ground and excited states of atomic cesium in a two-color evanescent field around a subwavelength-diameter fiber. We show that the light shifts of the 6S1/2[Lef-right arrow]6P3/2 transitions can be minimized by tuning one trapping l...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan 2005-03, Vol.74 (3), p.910-917
Main Authors: Le Kien, Fam, I. Balykin, Victor, Hakuta, Kohzo
Format: Article
Language:English
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Summary:We calculate the optical potentials, i.e., the light shifts, of the ground and excited states of atomic cesium in a two-color evanescent field around a subwavelength-diameter fiber. We show that the light shifts of the 6S1/2[Lef-right arrow]6P3/2 transitions can be minimized by tuning one trapping light to around 934.5 nm in wavelength (central red-detuned magic wavelength) and the other light to around 685.5 nm in wavelength (central blue-detuned magic wavelength). The simultaneous use of the red- and blue-detuned magic wavelengths allows state-insensitive two-color trapping and guiding of cesium atoms along the thin fiber. Our results can be used to efficiently load a two-color dipole trap by cesium atoms from a magneto-optical trap and to perform continuous observations.
ISSN:0031-9015
1347-4073
DOI:10.1143/JPSJ.74.910