光学学报, 2015, 35 (11): 1102001, 网络出版: 2015-10-15
利用光致原子解吸附实现磁光阱中单原子的高概率快速装载
Fast and High Probability Production of Single Cesium Atoms in a Magneto-Optical Trap Using Light-Induced Atomic Desorption
原子与分子物理学 磁光阱 光致原子解吸附 反馈控制 快速高概率装载 atomic and molecular physics magneto- optical trap light- induced atomic desorption feedback control fast and high probability production
摘要
基于390 nm 紫光诱导的光致原子解吸附效应,实现了大磁场梯度磁光阱中少数原子快速和高概率的装载。实验中通过开启390 nm 紫光使吸附在真空气室内壁上的原子解吸附,从而有效地增加了背景铯原子数密度,降低了大磁场梯度磁光阱中原子的装载时间,同时研究了磁光阱中装载的原子数目对紫光参数的依赖关系。利用这种全光学控制的方法,最终获得了磁光阱中装载一个原子、两个原子、三个原子的概率分别为98.0%,95.0%,80.1%,这对于下一步利用光学手段实现远失谐光学偶极阱中单原子高概率快速的装载以及利用空间光调制器扩展偶极阱阵列,实现偶极阱阵列中每个阱中单原子快速高概率装载具有重要意义。
Abstract
Fast and high probability production of single atoms in a cesium (Cs) magneto-optical trap (MOT) is demonstrated by using light-induced atomic desorption(LIAD). The atom’s loading time in a high-gradient vaporcell MOT is reduced by using the violet light emitting diode (LED), which can fire atomic desorption from the inner wall of vacuum glass cell to increase the density of background Cs atoms. The influence of the intensity of the violet LED light to the background atom number is also discussed. Finally, the measured occupation probability of one atom, two atoms, and three atoms are 98.2%, 95.0%, and 80.1% respectively in the MOT. Moreover, this technique could be especially useful for the deterministic loading of a single atom in a single microscopic optical tweezer or in two-dimensional array of microscopic optical tweezer.
刘贝, 靳刚, 王杰英, 何军, 王军民. 利用光致原子解吸附实现磁光阱中单原子的高概率快速装载[J]. 光学学报, 2015, 35(11): 1102001. Liu Bei, Jin Gang, Wang Jieying, He Jun, Wang Junmin. Fast and High Probability Production of Single Cesium Atoms in a Magneto-Optical Trap Using Light-Induced Atomic Desorption[J]. Acta Optica Sinica, 2015, 35(11): 1102001.