Electromagnetically induced transparency at optical nanofiber-cesium vapor interface
Electromagnetically induced transparency at optical nanofiber-cesium vapor interface
复制标题
光学纳米纤维-铯蒸气界面的电磁感应透明度
DOI：
10.1088/1674-1056/ab4d44
复制
发表时间：
2019
影响因子：
1.7
通讯作者：
Zhao Yan-Ting
中科院分区：
文献类型：
--
作者：
Liu Rui-Juan;Su Dian-Qiang;Song Zi-Xuan;Ji Zhong-Hua;Zhao Yan-Ting
光学耦合器（ONF）是一种有效控制光与原子耦合的特殊工具。本文通过观察6S→ 6P Cs原子在6P→ 8S控制光束作用下的ONF传输，研究了热铯蒸气中超低功率下的阶梯型电磁感应透明（EIT）。在不同强度的控制激光的EIT信号的线宽和传输进行了研究。此外，我们还利用多能级密度矩阵方程对ONF界面的非线性相互作用进行了理论研究，得到了理论与实验的良好一致性。这一结果对进一步研究低功率下的光学非线性效应具有重要意义。
Optical nanofiber (ONF) is a special tool for effectively controlling coupling of light and atoms. In this paper, we study the ladder-type electromagnetically induced transparent (EIT) under ultralow power level in a warm cesium vapor by observing the transmission of ONF that couples the 6S→ 6P Cs atoms in the presence of a 6P→ 8S control beam through the same fiber. The linewidth and transmission of the EIT signal are investigated at different intensities of the control laser. In addition, we theoretically study the nonlinear interaction at the ONF interface using the multi-level density matrix equations, and obtain good agreements between theory and experiments. The results may have great significance for further study of optical nonlinear effect at low power level.