LASER COOLING BELOW THE ONE-PHOTON RECOIL ENERGY BY VELOCITY-SELECTIVE COHERENT POPULATION TRAPPING
LASER COOLING BELOW THE ONE-PHOTON RECOIL ENERGY BY VELOCITY-SELECTIVE COHERENT POPULATION TRAPPING
复制标题
DOI：
10.1103/physrevlett.61.826
复制
发表时间：
1988-08-15
影响因子：
8.6
通讯作者：
COHENTANNOUDJI, C
中科院分区：
文献类型：
--
作者：
ASPECT, A;ARIMONDO, E;COHENTANNOUDJI, C
我们提出了一种新的激光冷却方案，该方案基于速度选择性光泵浦原子进入非吸收相干叠加态。这种方法使我们能够实现亚稳态 He 4 原子横向冷却至 2 μK 的温度，低于通常的多普勒冷却极限 (23 μK) 和单光子反冲能 (4 μK)。相应的德布罗意波长（1.4 μm）大于原子跃迁光学波长。
We present a new laser-cooling scheme based on velocity-selective optical pumping of atoms into a nonabsorbing coherent superposition of states. This method has allowed us to achieve transverse cooling of metastable He 4 atoms to a temperature of 2 μK, lower than both the usual Doppler cooling limit (23 μK) and the one-photon recoil energy (4 μK). The corresponding de Broglie wavelength (1.4 μm) is larger than the atomic-transition optical wavelength.