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Chin. Phys. B, 2015, Vol. 24(1): 014205    DOI: 10.1088/1674-1056/24/1/014205
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Macroscopic effects in electromagnetically-induced transparency in a Doppler-broadened system

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
a College of Material Sciences and Optoelectronic Technology, University of the Chinese Academy of Sciences, Beijing 100049, China;
b School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;
c Laboratory of Optical Physics, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Abstract  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.
Keywords:  electromagnetically-induced transparency      polarisation interference      Doppler-broadened system  
Received:  30 May 2014      Revised:  13 August 2014      Accepted manuscript online: 
PACS:  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
  42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974252, 11274376, 60978002, and 11179041), the National Basic Research Program of China (Grant No. 2010CB922904), the National High Technology Research and Development Program of China (Grant No. 2011AA120102), the Natural Science Foundation of Inner Mongolia, China (Grants No. 2012MS0101), and the Innovation Fund of Inner Mongolia University of Science and Technology, China (Grants No. 2010NC064).
Corresponding Authors:  Fu Pan-Ming, Zuo Zhan-Chun     E-mail:  pmfu@aphy.iphy.ac.cn;zczuo@aphy.iphy.ac.cn

Cite this article: 

Pei Li-Ya (裴丽娅), Niu Jin-Yan (牛金艳), Wang Ru-Quan (王如泉), Qu Yi-Zhi (屈一至), Wu Ling-An (吴令安), Fu Pan-Ming (傅盘铭), Zuo Zhan-Chun (左战春) Macroscopic effects in electromagnetically-induced transparency in a Doppler-broadened system 2015 Chin. Phys. B 24 014205

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