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
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
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.
JI Xian-Ming;YIN Jian-Ping. One- and Two-Dimensional Arrays of Double-Well Optical Traps for Cold Atoms or Molecules[J]. 中国物理快报, 2004, 21(12): 2399-2402.
JI Xian-Ming, YIN Jian-Ping. One- and Two-Dimensional Arrays of Double-Well Optical Traps for Cold Atoms or Molecules. Chin. Phys. Lett., 2004, 21(12): 2399-2402.
2004, Vol. 21 
