A Novel Gravito-Optical Surface Trap for Neutral Atoms
XIE Chun-Xia, WANG Zhengling, YIN Jian-Ping
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062
A Novel Gravito-Optical Surface Trap for Neutral Atoms
XIE Chun-Xia;WANG Zhengling;YIN Jian-Ping
Key Laboratory of Optical and Magnetic Resonance Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062
关键词 ：
32.80.Pj ,
32.80.Lg ,
42.50.Vk
Abstract ： We propose a novel gravito-optical surface trap (GOST) for neutral atoms based on one-dimensional intensity gradient cooling. The surface optical trap is composed of a blue-detuned reduced semi-Gaussian laser beam (SGB), a far-blue-detuned dark hollow beam and the gravity field. The SGB is produced by the diffraction of a collimated Gaussian laser beam passing through the straight edge of a semi-infinite opaque plate and then is reduced by an imaging lens. We calculate the intensity distribution of the reduced SGB, and study the dynamic process of the SGB intensity-gradient induced Sisyphus cooling for 87 Rb atoms by using Monte Carlo simulations. Our study shows that the proposed GOST can be used not only to trap cold atoms loaded from a standard magneto-optical trap, but also to cool the trapped atoms to an equilibrium temperature of 3.47μK from ～120μK, even to realize an all-optical two-dimensional Bose--Einstein condensation by using optical-potential evaporative cooling.
Key words ：
32.80.Pj
32.80.Lg
42.50.Vk
出版日期: 2006-04-01
引用本文:
XIE Chun-Xia;WANG Zhengling;YIN Jian-Ping. A Novel Gravito-Optical Surface Trap for Neutral Atoms[J]. 中国物理快报, 2006, 23(4): 822-825.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2006/V23/I4/822
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2006, Vol. 23 
