Calculation of line shapes in double-resonance optical pumping
Calculation of line shapes in double-resonance optical pumping
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DOI：
10.1103/physreva.80.022509
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发表时间：
2009-08-01
影响因子：
2.9
通讯作者：
Moon, Han Seb
中科院分区：
文献类型：
--
作者：
Noh, Heung-Ryoul;Moon, Han Seb
对Rb-87原子5S(1/2)-5P(3/2)-4D(3/2,5/2)跃迁双共振光泵浦进行了理论研究。在存在探针和耦合激光束的情况下，对超精细能级的所有相关磁性子能级的全密度矩阵方程进行了数值求解，并将探测光束的吸收计算为耦合光束失谐的函数。将计算结果与实验数据进行比较，结果非常吻合。该结果还与忽略基态和最高激发能级之间的相干性时计算的近似结果进行了比较。我们发现双谐振信号的主要运行机制是光泵浦而不是双光子相干性，尽管后者对信号影响很大。
A theoretical study on double-resonance optical pumping for the transitions 5S(1/2)-5P(3/2)-4D(3/2,5/2) of Rb-87 atoms is presented. The full-density-matrix equations in the presence the probe and the coupling laser beams for all relevant magnetic sublevels of the hyperfine levels were solved numerically, and the absorption of a probe beam was calculated as a function of the detuning of the coupling beam. The calculated results were compared with experimental data, and they showed an excellent agreement. The results were also compared with the approximate results calculated when the coherence between the ground and the highest excited levels was neglected. We found that the dominant operating mechanism for double-resonance signals was the optical pumping rather than the two-photon coherence, although the latter affected the signals significantly.