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

doi:10.1088/1674-1056/24/1/014205

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

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

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