Electromagnetically induced transparency at optical nanofiber–cesium vapor interface  

作　　者：Rui-Juan Liu Dian-Qiang Su Zi-Xuan Song Zhong-Hua Ji Yan-Ting Zhao 刘瑞娟;苏殿强;宋子旋;姬中华;赵延霆(State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University.Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Laser Spectroscopy,Shanxi University.Taiyuan 030006,China [2]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China

出　　处：《Chinese Physics B》2019年第12期148-152,共5页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant No.2017YFA0304203);the National Natural Science Foundation of China(Grant Nos.61675120,11434007,and 61875110);Project of the National Natural Science Foundation of China for Excellent Research Team(Grant No.61121064);the Shanxi “1331 Project” Key Subjects Construction,PCSIRT,China(Grant No.IRT_17R70);the 111 Project,China(Grant No.D18001)

摘　　要：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 6 S → 6 P Cs atoms in the presence of a 6 P → 8 S 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.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 6 S → 6 P Cs atoms in the presence of a 6 P → 8 S 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.

关 键 词：optical nanofiber electromagnetically induced transparent density-matrix equation 

分 类 号：TN2[电子电信—物理电子学]