光学学报, 2007, 27 (8): 1366, 网络出版: 2007-09-05
各向同性光场对原子束的分步减速
Scheme of Stepped Slowing Rb Atomic Beams by Isotropic Laser Light
原子与分子物理 原子束 各向同性光场 积分球 多普勒频移 分步减速 atomic and molecular physics atomic beam isotropic light field integrating sphere Doppler shift stepped slowing
摘要
通过理论分析计算了积分球中各向同性光场对原子产生的辐射压力,提出了一种新的激光对原子束的减速方案:将原子炉产生的热铷原子束通过五个直径为10 cm的积分球,积分球内部各向同性光场的失谐量从Δ=-70Γ依次减小到Δ=-10Γ,从而可以对原子束进行减速和冷却。通过对减速过程的数值计算结果发现,该方案可以把速度小于331 m/s的原子束减速和冷却到小于1 m/s,接近多普勒极限。
Abstract
We calculated the radiation force on atoms in an isotropic light produced by an integrating sphere. Then we present a new scheme of atomic beam slowing by 5 integrating spheres which are arranged in series with detuning of laser and atomic transition frequency from -70Γ to -10Γ respectively. The numerical results show that we can capture the atoms with velocity less than 331 m/s, and slow them down to less than 1 m/s, close to the Doppler limit.
张文卓, 成华东, 马红玉, 刘亮, 王育竹. 各向同性光场对原子束的分步减速[J]. 光学学报, 2007, 27(8): 1366. 张文卓, 成华东, 马红玉, 刘亮, 王育竹. Scheme of Stepped Slowing Rb Atomic Beams by Isotropic Laser Light[J]. Acta Optica Sinica, 2007, 27(8): 1366.