Chinese Physics Letters

Generation of One-Dimensional Array of Focused Hollow-Beam Pipes and Its Surface Microscopic Waveguide for Cold Atoms or Molecules

Ji Xian-Ming, Yong Xia, Yin Jian-Ping

Published Jul 1, 2004• 2 citations

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 85 Rb atoms. The result shows that when the blue detuning of the incident beam and its intensity are 10 GHz and 7.0×10 3 W/m 2 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 85 Rb atoms (~20 μK) from a standard optical molasses and then to realize the 1D array of surface atomic waveguides on an atom chip.

DOI: 10.1088/0256-307x/21/7/024

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