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Generation of One-Dimensional Array of Focused Hollow-Beam Pipes and Its Surface Microscopic Waveguide for Cold Atoms or Molecules |
| JI Xian-Ming1,2;XIA Yong1;YIN Jian-Ping1 |
| 1Key Laboratory for Optical and Magnetic Resonance Spectroscopy, East China Normal University, Shanghai 200062
2Department of Physics, Nantong Teachers College, Nantong 226007 |
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| Cite this article: |
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JI Xian-Ming, XIA Yong, YIN Jian-Ping 2004 Chin. Phys. Lett. 21 1272-1275 |
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Abstract We propose a new scheme to guide cold atoms (or molecules) by using a one-dimensional (1D) array of focused hollow-beam pipes generated by the combination of a binary phase grating and a 1D array of micro-cylindrical lenses on the substrate surface. We also calculate the intensity distribution of the focused hollow-beam pipe array and its optical potential for 85Rb atoms. The result shows that when the blue detuning of the incident beam and its intensity are 10 GHz and 7.0 x 103W/m2 respectively, the horizontal dark spot size of each focused hollow-beam pipe and the efficient optical potential are 4.4 μm and ~ 0.23 mK, which is high enough to guide cold 85Rb atoms (~20 μK) from a standard optical molasses and then to realize the 1D array of surface atomic waveguides on an atom chip.
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| Keywords:
42.50.Vk
32.80.Lg
32.80.Pj
03.50.De
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Published: 01 July 2004
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