山西大学物理电子工程学院, 山西 太原 030006
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。
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
Author Affiliations
Abstract
College of Physics and Electronics Engineering, Shanxi University, Taiyuan 030006, China
The cavity transmission spectrum is experimentally investigated in Λ-type three-level atoms coupled to a standing-wave cavity system. It is shown that the dark-state polariton peak is not generated at resonance but rather at off-resonance. The theoretical analysis reveals that the absence of an on-resonance dark-state polariton peak is mainly caused by the strong absorption of the intracavity medium to the probe cavity mode counterpropagating with the coupling field due to the Doppler shift in the hot atoms. Moreover, the optimal frequency position of the cavity mode for an efficient dark-state polariton peak is also demonstrated.
140.4780 Optical resonators 020.1670 Coherent optical effects 270.0270 Quantum optics Chinese Optics Letters
2017, 15(8): 081401
