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Chinese Physics, 2006, Vol. 15(2): 365-370    DOI: 10.1088/1009-1963/15/2/022

Experimental investigation of slow light propagation in degenerate two-level system

Wang Li-Rong (汪丽蓉), Zhao Yan-Ting (赵延霆), Ma Jie (马杰), Zhao Jian-Ming (赵建明), Xiao Lian-Tuan (肖连团), Jia Suo-Tang (贾锁堂)
State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering,Shanxi University, Taiyuan 030006, China
Abstract  Slowing a light pulse in a degenerate two-level system is observed with a double-frequency sweeping technique. The effects of coupling beam intensity, cell temperature and frequency detunings of the coupling and probe beams in resonance, on the slowing of light propagation in such a system are investigated. It is found that group velocities depend strongly on polarization combinations. A group velocity $v_{\rm g}$=6760m/s of light pulses in caesium vapour is obtained under the optimal parameters.
Keywords:  electromagnetically induced transparency      time delay      group velocity   
Received:  11 May 2005      Revised:  11 November 2005      Accepted manuscript online: 
PACS:  42.50.Md (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)  
  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
  37.10.De (Atom cooling methods)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 10174047 and 60378004),the Natural Science Foundation of Shanxi Province (Grant No 20021032) and the Youth Science Foundation of Shanxi Province (Grant Nos 20031004 and 20041013).

Cite this article: 

Wang Li-Rong (汪丽蓉), Zhao Yan-Ting (赵延霆), Ma Jie (马杰), Zhao Jian-Ming (赵建明), Xiao Lian-Tuan (肖连团), Jia Suo-Tang (贾锁堂) Experimental investigation of slow light propagation in degenerate two-level system 2006 Chinese Physics 15 365

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