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arXiv 2201.10490physics.atom-phphysics.optics
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多普勒展宽四波混频中的动态斯塔克位移

Dynamic Stark shift in a Doppler-broadened four-wave mixing

M. P. M. de Souza, A. A. C. de Almeida, S. S. Vianna

摘要:

本文对三能级级联多普勒展宽系统中产生的四波混频信号的Autler-Townes分裂模式进行了理论分析。我们采用密度矩阵的形式主义写的Bloch方程和数值求解。该解决方案使我们能够比较均匀和非均匀加宽系统的上能级人口和所产生的信号相干性的响应。我们的研究结果揭示了AC斯塔克位移的非线性信号时,强或弱光束的频率被扫描,在荧光中观察到的。此外,我们提出的四波混频信号在热铷蒸汽的激发光束的共传播配置的实验数据。交流斯塔克位移和信号幅度作为激光功率的函数的行为表明模型和实验结果之间的良好协议。

英文摘要:

This work presents a theoretical analysis of the Autler-Townes splitting pattern in the four-wave mixing signal generated in a three-level cascade Doppler-broadened system. We employ the density matrix formalism to write the Bloch equations and solve them numerically. The solutions allow us to compare the response of the upper level population and the generated signal coherence for homogeneously and non-homogeneously broadened systems. Our results reveal an AC Stark shift in the nonlinear signal when the frequency of the strong or weak beam is scanned, in contrast to what is observed in the fluorescence. Furthermore, we present experimental data for the four-wave mixing signal in a hot rubidium vapor for the copropagating configuration of the exciting beams. The behavior of the AC Stark displacement and signal amplitude as a function of laser power indicates a good agreement between the model and the experimental results.

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。

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