中国物理B ›› 2002, Vol. 11 ›› Issue (6): 572-577.doi: 10.1088/1009-1963/11/6/310

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Absorption properties of a driven Doppler-broadened ladder system with hyperfine structure

吴金辉1, 高锦岳2   

  1. (1)College of Physics, Jilin University, Changchun 130023, China; (2)College of Physics, Jilin University, Changchun 130023, China; China Center of Advanced Science and Technology (World Laboratory), Beijing 100080, China
  • 收稿日期:2001-11-09 修回日期:2002-01-06 出版日期:2002-06-12 发布日期:2005-06-12
  • 基金资助:
    Project supported in part by the National Natural Science Foundation of China (Grant No 60078015), and by the Doctoral Programme Foundation of the Institution of Higher Education of China (Grant No 19201038).

Absorption properties of a driven Doppler-broadened ladder system with hyperfine structure

Wu Jin-Hui (吴金辉)a, Gao Jin-Yue (高锦岳)ab   

  1. a College of Physics, Jilin University, Changchun 130023, China; b China Center of Advanced Science and Technology (World Laboratory), Beijing 100080, China
  • Received:2001-11-09 Revised:2002-01-06 Online:2002-06-12 Published:2005-06-12
  • Supported by:
    Project supported in part by the National Natural Science Foundation of China (Grant No 60078015), and by the Doctoral Programme Foundation of the Institution of Higher Education of China (Grant No 19201038).

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摘要： We have studied the absorption spectrum of a Doppler-broadened ladder system, where the highest level is coupled into two middle hyperfine sublevels by a strong coherent field. We find that, when the system is considered as homogeneous, either two or three spectral components are observed, depending on the detuning of the coherent field. But when the velocity distribution of atoms is considered, we can always observe one electromagnetically induced transparency (EIT) window with high dispersion. So the atomic hyperfine structure cannot be an impediment for obtaining EIT.

Abstract: We have studied the absorption spectrum of a Doppler-broadened ladder system, where the highest level is coupled into two middle hyperfine sublevels by a strong coherent field. We find that, when the system is considered as homogeneous, either two or three spectral components are observed, depending on the detuning of the coherent field. But when the velocity distribution of atoms is considered, we can always observe one electromagnetically induced transparency (EIT) window with high dispersion. So the atomic hyperfine structure cannot be an impediment for obtaining EIT.

Key words: absorption spectrum, electromagnetically induced transparency, dressed atomic states

中图分类号:  (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

  • 42.50.Gy
32.70.Jz (Line shapes, widths, and shifts) 32.10.Fn (Fine and hyperfine structure) 32.80.-t (Photoionization and excitation)