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One- and Two-Dimensional Arrays of Double-Well Optical Traps for Cold Atoms or Molecules |
| JI Xian-Ming1,2;YIN Jian-Ping1 |
| 1Key Laboratory for Optical and Magnetic Resonance Spectroscopy, East China Normal University, Shanghai 200062
2Department of Physics, Nantong University, Nantong 226007 |
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| Cite this article: |
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JI Xian-Ming, YIN Jian-Ping 2004 Chin. Phys. Lett. 21 2399-2402 |
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Abstract We propose a novel scheme to form one- and two-dimensional arrays of double-well optical dipole traps for cold atoms (or molecules) by using an optical system composed of a binary π-phase grating and a lens illuminated by a plane light wave, and study the relationship between the maximum intensity Imax of each optical well (or the maximum trapping potential Umax for 85Rb atoms) and the relative aperture β(= a/f) of the lens. We also calculate the intensity gradients of each optical well and their curvatures, and estimate the spontaneous photon-scattering rate of trapped atom in each well, including Rayleigh and Raman scattering rates. Our study shows that the proposed 1D and 2D arrays of double-well traps can be used to prepare 1D and 2D novel optical lattices with cold atoms (or molecules), or form an all-optically integrated atom optical chip, or even to realize an array of all-optical double-well atomic (or molecular) Bose--Einstein condensates by optical-potential evaporative cooling, and so on.
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| Keywords:
32.80.Pj
32.80.Lg
33.80.Ps
42.50.Vk
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Published: 01 December 2004
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