›› 2015, Vol. 24 ›› Issue (1): 14205-014205.doi: 10.1088/1674-1056/24/1/014205
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
裴丽娅a, 牛金艳b, 王如泉c, 屈一至a, 吴令安c, 傅盘铭c, 左战春c
Pei Li-Ya (裴丽娅)a, Niu Jin-Yan (牛金艳)b, Wang Ru-Quan (王如泉)c, Qu Yi-Zhi (屈一至)a, Wu Ling-An (吴令安)c, Fu Pan-Ming (傅盘铭)c, Zuo Zhan-Chun (左战春)c
摘要: We study the electromagnetically-induced transparency (EIT) in a Doppler-broadened cascaded three-level system. We decompose the susceptibility responsible for the EIT resonance into a linear and a nonlinear part, and the EIT resonance reflects mainly the characteristics of the nonlinear susceptibility. It is found that the macroscopic polarization interference effect plays a crucial role in determining the EIT resonance spectrum. To obtain a Doppler-free spectrum there must be polarization interference between atoms of different velocities. A dressed-state model, which analyzes the velocities at which the atoms are in resonance with the dressed states through Doppler frequency shifting, is employed to explain the results.
中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)