标题： 惰性背景气体和光照对铷蒸气三色电磁诱导透明性的影响 显示英文标题

标题： Effects of inert background gases and photo-illumination on three-color electromagnetically induced transparency of rubidium vapor

摘要： 在50 mTorr和500 mTorr惰性气体（Ar、Ne和N$_2$）存在的情况下，研究了室温下铷蒸汽的三色里德堡电磁诱导透明(EIT)现象。 观察到的EIT谱线发生位移，并出现蓝失谐卫星线，这取决于惰性气体种类和压力。 卫星线与主EIT线的分离大约与压力无关，而卫星线的强度随着惰性气体的压力增加而增强。 卫星线归因于中间态$5D_{3/2}$的超精细碰撞。 进一步分析里德堡能级的斯塔克效应，发现惰性气体抑制了气室中的静态电场，该电场是由辅助453 nm激光照射气室壁面所引起的。 在这项工作中，我们利用由EIT激光和可选射频场激发的主量子数$n$为25和50、角动量$\ell$为3至6的里德堡能级。 这项工作对于混合物种暖蒸汽的光谱研究、气室中里德堡原子的传感应用以及低压放电等离子体的非侵入式电场诊断具有重要意义。 显示英文摘要

摘要： Three-color Rydberg electromagnetically induced transparency (EIT) of room-temperature Rb vapor in the presence of inert gases (Ar, Ne, and N$_2$) at 50~mTorr and 500~mTorr is investigated. The observed EIT lines shift and develop blue-detuned satellite lines, dependent on inert-gas species and pressure. The separations of the satellite from the main EIT lines are approximately pressure-independent, while their strength increases with inert-gas pressure. The satellite lines are attributed to hyperfine collisions of the intermediate $5D_{3/2}$ state. Further, analyzing the Stark effect of Rydberg levels, it is found that the inert gases suppress static electric fields in the vapor cells, which we induce by photo-illumination of the cell walls with an auxiliary 453-nm laser. In the work, we utilize Rydberg levels with principal quantum numbers $n$ = 25 and 50 and angular momenta $\ell$ = 3 up to 6, excited by the EIT lasers and optional radio-frequency dressing fields. The work is of interest in the spectroscopic study of mixed-species warm vapors, in sensing applications of Rydberg atoms in vapor cells, and in non-invasive electric-field diagnostics of low-pressure discharge plasma.