Novel optical trap of atoms with a doughnut beam
Novel optical trap of atoms with a doughnut beam
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DOI：
10.1103/physrevlett.78.4713
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发表时间：
1997-06-23
影响因子：
8.6
通讯作者：
Sasada, H
中科院分区：
文献类型：
--
作者：
Kuga, T;Torii, Y;Sasada, H
我们利用一束频率相对于原子跃迁呈蓝失谐的拉盖尔 - 高斯（环形）光束构建了一种用于中性原子的新型光阱。借助两束额外的激光束限制原子沿光轴的运动，激光冷却的铷原子被囚禁在环形光束的暗核中。最初约有\(10^{8}\)个原子被装载到光阱中，其寿命为150毫秒。由于原子在没有任何外场的情况下被限制在弱辐射场中的一个点上，这为精密测量提供了理想的环境。这种光阱为一种简单的原子操控技术开辟了道路，包括气态原子的玻色 - 爱因斯坦凝聚。
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.