极薄容器中铯蒸气亚多普勒光谱的饱和效应
Saturation effects in the sub-Doppler spectroscopy of Cesium vapor confined in an Extremely Thin Cell
摘要：
本文从实验和理论上研究了饱和效应对超薄盒（盒厚$L < 1 μm$）中原子蒸气吸收光谱和荧光光谱的影响。该研究是在$D_{2}$线（$Cs$的$λ~= ~852 nm)$）上进行的，并集中在两种情况$L = λ/2$和$L =λ$上，这两种情况相对于相干Dicke窄化的长度依赖性是对比最大的。对于$L = λ/2$，当增加光强度时，Dicke窄化吸收轮廓简单地加宽并且在幅度上饱和，而对于$L =λ$，在宽吸收轮廓上出现线中心处的降低吸收的亚多普勒下降。对于在$L =λ$的荧光检测，饱和诱导窄的下降，但仅对于通过光泵浦经历布居损失的超精细组分。这些实验结果的解释与现有的各种模型的帮助下，并与数值计算的基础上，考虑一个封闭的和开放的系统的两级建模进行比较。
英文摘要：
Saturation effects affecting absorption and fluorescence spectra of an atomic vapor confined in an Extremely Thin Cell (cell thickness $L < 1 μm$) are investigated experimentally and theoretically. The study is performed on the $D_{2}$ line ($λ~= ~852 nm)$ of $Cs$ and concentrates on the two situations $L = λ/2$ and $L =λ$, the most contrasted ones with respect to the length dependence of the coherent Dicke narrowing. For $L = λ/2$, the Dicke-narrowed absorption profile simply broadens and saturates in amplitude when increasing the light intensity, while for $L =λ$, sub-Doppler dips of reduced absorption at line-center appear on the broad absorption profile. For a fluorescence detection at $L =λ$, saturation induces narrow dips, but only for hyperfine components undergoing a population loss through optical pumping. These experimental results are interpreted with the help of the various existing models, and are compared with numerical calculations based upon a two-level modelling that considers both a closed and an open system.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
