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Atom on nanofiber

(collaboration with University of Electro-Communications, Japan. Group Pof. K. Hakuta)

We suggest using an evanescent wave around a thin fiber to trap atoms. We show that the gradient force of a red-detuned evanescent-wave field in the fundamental mode of a silica fiber can balance the centrifugal force when the fiber diameter is about two times smaller than the wavelength of the light and the component of the angular momentum of the atoms along the fiber axis is in an appropriate range. As an example, the system should be realizable for cesium atoms at a temperature of less than 0.29 mK using a silica fiber with a radius of 0.2 mm and a 1.3-mm-wavelength light with a power of about 27 mW.

References:

1. K.P. Nayak, P.N. Melentiev, M. Morinaga, Fam Le Kien, V.I. Balykin, and, K. Hakuta, "Optical Nanofibers for Manipulating and Probing Single-Atom Fluorescence", Optics Express, Vol. 15, 5431
2. K. P. Nayak, P. N. Melentiev, M. Morinaga, Fam Le Kien, V. I. Balykin, K. Hakuta, "Optical Nanofibers for Manipulating and Probing Single-Atom Fluorescence", arXiv:quant-ph/0610136v1 (2007)
3. Fam Le Kien, V. I. Balykin, and K. Hakuta, "Angular momentum of light in an optical nanofiber", Physical Review A 73, 053823 (2006)
4. Fam Le Kien, V. I. Balykin, and K. Hakuta, "Light-induced force and torque on an atom outside a nanofiber"
5. Fam Le Kien, V. I. Balykin, and K. Hakuta, "Scattering of an evanescent light field by a single cesium atom near a nanofiber", Physical Review A, 73, 013819 (2006)
6. Fam Le Kien, S. Dutta Gupta, V. I. Balykin, and K. Hakuta, "Spontaneous emission of a cesium atom near a nanofiber: Efficient coupling of light to guided modes", Physical Review A, 72, 032509 (2005)
7. Fam Le Kien, V. I. Balykin and K. Hakuta, "State-Insensitive Trapping and Guiding of Cesium Atoms Using a Two-Color Evanescent Field around a Subwavelength-Diameter Fiber", Journal of the Physical Society of Japan, Vol. 74, No. 3, March, pp. 910–917, (2005)
8. V. I. Balykin, K. Hakuta, Fam Le Kien, etc. "Atom trapping and guiding with a subwavelength-diameter optical fiber" Phys. Rev. A, Vol. 70, 011401 (2004).
9. Fam Le Kien,V.I.Balykin, K.Hakuta "Atom trap and waveguide using a two-color evanescent light around a subwavelength-diameter optical fiber", Phys. Rev. A, Vol. 70,063403 (2004).
10. Fam Le Kiena, J.Q.Lianga, K.Hakutaa, V.I.Balykin,"Field intensity distributions and polarization orientations in a vacuum-clad subwavelength-diameter optical fiber", Opt. Comm.article in press (2004).
11. Fam Le Kien, V. I. Balykin, and K. Hakuta, "Atom trap and waveguide using a two-color evanescent light field around a subwavelength-diameter optical fiber", arXiv:quant-ph/0407107 v2 22 Jul (2004)
12. V. I. Balykin, K. Hakuta, Fam Le Kien, J. Q. Liang and M. Morinaga, "Atom trapping and guiding with a subwavelength-diameter optical fiber", arXiv:physics/0404110 v1 23 Apr (2004)

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