论文标题
多普勒变窄，Zeeman和激光束形效应$λ$ -Type电磁诱导的$^{85} $ rb D2在蒸气单元格中的透明度
Doppler narrowing, Zeeman and laser beam-shape effects in $Λ$-type Electromagnetically Induced Transparency on the $^{85}$Rb D2 line in a vapor cell
论文作者
论文摘要
我们研究了无抗释放涂层的无缓冲液热蒸气电池中RB D2转变的$λ$ -Type电磁诱导的透明度（EIT）。实验数据表明，速度选择性光学泵送和一种EIT共振的特征。研究了最多12高斯的磁场中EIT线的Zeeman分裂。一个Zeeman组件没有一阶移位，其二阶转移与理论非常吻合。由于多普勒的缩小，该磁场不敏感的EIT共振的全宽度最大（FWHM）降低，在所研究范围内以拉比频率线性缩放，并在最低功率下达到约100〜kHz。这些观察结果与参考文献中开发的多普勒 - 巴科介质的分析模型一致。 \ cite {physreva.66.013805,7653385}。使用Lindblad方程的数值模拟表明，必须包括横向激光强度分布和两个$λ$ -EIT系统，以充分说明信号的测量线宽度和线形状。讨论了由包括残留光学频率波动，原子壁和痕量气体碰撞的效果引起的地面镇压。
We study $Λ$-type Electromagnetically Induced Transparency (EIT) on the Rb D2 transition in a buffer-gas-free thermal vapor cell without anti-relaxation coating. Experimental data show distinguished features of velocity-selective optical pumping and one EIT resonance. The Zeeman splitting of the EIT line in magnetic fields up to 12 Gauss is investigated. One Zeeman component is free of the first-order shift and its second-order shift agrees well with theory. The full width at half maximum (FWHM) of this magnetic-field-insensitive EIT resonance is reduced due to Doppler narrowing, scales linearly in Rabi frequency over the range studied, and reaches about 100~kHz at the lowest powers. These observations agree with an analytic model for a Doppler-broadened medium developed in Ref. \cite{PhysRevA.66.013805,7653385}. Numerical simulation using the Lindblad equation reveals that the transverse laser intensity distribution and two $Λ$-EIT systems must be included to fully account for the measured line width and line shape of the signals. Ground-state decoherence, caused by effects that include residual optical frequency fluctuations, atom-wall and trace-gas collisions, is discussed.
