Novel optical trap of atoms with a doughnut beam

被引:782
作者
Kuga, T [1 ]
Torii, Y [1 ]
Shiokawa, N [1 ]
Hirano, T [1 ]
Shimizu, Y [1 ]
Sasada, H [1 ]
机构
[1] KEIO UNIV, FAC SCI & TECHNOL, DEPT PHYS, KOHOKU KU, YOKOHAMA, KANAGAWA 223, JAPAN
关键词
D O I
10.1103/PhysRevLett.78.4713
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We have constructed a novel optical trap for neutral atoms by using a Laguerre-Gaussian (doughnut) beam whose frequency is blue detuned to the atomic transition. Laser-cooled rubidium atoms are trapped in the dark core of the doughnut beam with the help of two additional laser beams which limit the atomic motion along the optical axis. About 10(8) atoms are initially loaded into the trap, and the lifetime is 150 ms. Because the atoms are confined at a point in a weak radiation field in the absence of any external field, ideal circumstances are provided for precision measurements. The trap opens the way to a simple technique for atom manipulation, including Bose-Einstein condensation of gaseous atoms.
引用
收藏
页码:4713 / 4716
页数:4
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