基于简并二能级原子系统的电磁诱导增益  

Electromagnetically Induced Gain Based on Degenerate Two-Level Atomic System

作　　者：韩宇宏 车少娜 王丹[1] 周海涛[1] Han Yuhong, Che Shaona, Wang Dan, Zhou Haitao(School of Physics and Electronic Engineering, Shanxi University, Taiyuan, Shanxi 030006, Chin)

机构地区：[1]山西大学物理电子工程学院,山西太原030006

出　　处：《光学学报》2018年第3期242-249,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61575112;61308121;11647119)

摘　　要：理论和实验研究了基于简并二能级原子系统的电磁诱导增益(EIG)效应,构建了一个N型简并二能级系统,分析了在不同多普勒频移下信号光增益随抽运光拉比频率的变化规律。结果表明:在增大区间,增益谱一直保持线宽极窄的单峰结构;而在减小区间,增益谱产生类拉比分裂,并且呈现出对称的双峰结构。选择Cs原子基态和激发态角动量相同条件下的简并能级结构,实验研究了EIG的产生特点,并进一步分析了抽运光强度及信号光偏振对增益峰值效率的影响。The electromagnetic induced gain （EIG） effects based on the degenerate two-level atomic system are theoretically and experimentally studied. By constructing a N-type degenerate two-level system, the variations of signal light gain with Rabi frequency of pumping light are theoretically analyzed under different Doppler shifts. The restdts show that, in the rising range, the gain spectrum keeps a single peak structure with a narrow linewidth; while in the decreasing range, it generates a Rabi-like splitting and exhibits a symmetrical two-peak profile. Based on the degenerate energy levels of Cs atoms in which the angular momenta of ground and excited states are same, the generation feature of EIG is experimentally investigated. Furthermore, the influences of pumping intensity and signal light polarization on the peak gain efficiency are also analyzed.

关 键 词：原子与分子物理学 电磁诱导透明 电磁诱导增益 拉比频率 简并二能级系统 多普勒频移 

分 类 号：O436[机械工程—光学工程]