Laser cooling of trapped ytterbium ions using a four-level optical-excitation scheme.
Laser cooling of trapped ytterbium ions using a four-level optical-excitation scheme.
复制标题
使用四级光学激发方案对捕获的镱离子进行激光冷却。
DOI：
10.1103/physreva.44.r20
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Schnier
中科院分区：
文献类型：
--
作者：
Bell;Gill;Klein;Levick;Tamm;Schnier
We demonstrate laser cooling of 172 Yb + ions in a rf quadrupole trap using an alternative optical-excitation scheme. The metastable 4f 14 5d 2 D 3/2 state of Yb + , to which ions decay if the resonance (cooling) transition is driven, is depleted by driving an optical transition at a wavelength of 935 nm, which is much more attractive than the 2.438 μm radiation used previously. This couples the metastable state to a fourth energy level from which the ions decay rapidly to the ground state. Fluorescence line shapes of the cooling transition indicate that small numbers of Yb + ions were cooled in this way to kinetic temperatures below 1 K.
