物理学报Issue(5)：053202-1-053202-5,5.DOI:10.7498/aps.63.053202
磁光阱中单原子荧光信号的优化及单原子的高效装载
Optimization of the light-induced-fluorescence signals of single atoms and efficient loading of single atoms into a magneto-optical trap
摘要
Abstract
In our experiment, firstly, we carry out the loading of single atoms in the magneto-optical trap (MOT) by increasing the quadrupole magnetic field gradient, improving the background vacuum, and reducing the diameters of the cooling and trapping laser beams. Secondly, we get the single atomic fluorescence signal of a high signal-to-background ratio in the MOT by means of reducing the detuning of cooling light and increasing its intensity appropriately, and using the polarization spectroscopy locking technique to suppress the fluctuations of cooling laser. In addition, with the real-time feedback on quadrupole magnetic field gradient, we demonstrate a probability of loading single atoms in the MOT as high as 98%. We also measure the statistical properties of the single atomic fluorescence which is excited by continuous light in the MOT;the measured second-order correlation is g(2)(τ =0)=0.09.关键词
单原子/磁光阱/信号背景比/高效装载Key words
single atoms/magneto-optical trap/signal-to-background ratio/effcient loading引用本文复制引用
王杰英,刘贝,刁文婷,靳刚,何军,王军民..磁光阱中单原子荧光信号的优化及单原子的高效装载[J].物理学报,2014,(5):053202-1-053202-5,5.基金项目
国家重大科学研究计划(批准号:2012CB921601)、国家自然科学基金(批准号:11274213,61205215,61227902)、国家自然科学基金创新群体项目(批准号:61121064)、山西省回国留学人员科研经费(批准号:2012-015)和山西省太原市科技明星专项(批准号:12024707)资助的课题@@@@project supported by the National Basic Research Program of China (Grant No.2012CB921601), the National Natural Science Foundation of China (Grant Nos.11274213,61205215,61227902), the National Natural Science Foundation of Innovative Research Group Project (Grant No.61121064), the Shanxi Scholarship Council of China (Grant No.2012-015), and the Research Program for Sci & Tech Star of Taiyuan, Shanxi Province, China (Grant No.12024707) （批准号:2012CB921601）
