中国物理B ›› 2006, Vol. 15 ›› Issue (4): 721-728.doi: 10.1088/1009-1963/15/4/012

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One- and two-photon absorption-amplification response in a four-level atomic system with vacuum-induced coherence

李家华1, 刘继兵1, 谢小涛1, 陈爱喜2   

  1. (1)epartment of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; (2)epartment of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;Department of Applied Physics, School of Basic Science, East China Jiaotong University, Nanchang 330013, China
  • 收稿日期:2005-09-27 修回日期:2005-11-10 出版日期:2006-04-20 发布日期:2006-04-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10575040 and 90503010).

One- and two-photon absorption-amplification response in a four-level atomic system with vacuum-induced coherence

Li Jia-Hua (李家华)a,  Chen Ai-Xi (陈爱喜)ab, Liu Ji-Bing (刘继兵)a, Xie Xiao-Tao (谢小涛)a   

  1. a Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China; b Department of Applied Physics, School of Basic Science, East China Jiaotong University, Nanchang 330013, China
  • Received:2005-09-27 Revised:2005-11-10 Online:2006-04-20 Published:2006-04-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10575040 and 90503010).

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摘要： This paper theoretically studies the effects of the vacuum-induced coherence on one- and two-photon absorption in a four-level atomic medium. It finds that the one- and two-photon absorption and amplification properties are quite sensitive to the vacuum-induced coherence. It is also shown that the one- and two-photon absorption spectra can be dramatically affected by modulating the relative phase of the applied fields. With the proper choice of the relative phase, the amplification without inversion for the probe field can be realized.

关键词: one-photon absorption, two-photon absorption, vacuum-induced coherence, probe amplification

Abstract: This paper theoretically studies the effects of the vacuum-induced coherence on one- and two-photon absorption in a four-level atomic medium. It finds that the one- and two-photon absorption and amplification properties are quite sensitive to the vacuum-induced coherence. It is also shown that the one- and two-photon absorption spectra can be dramatically affected by modulating the relative phase of the applied fields. With the proper choice of the relative phase, the amplification without inversion for the probe field can be realized.

Key words: one-photon absorption, two-photon absorption, vacuum-induced coherence, probe amplification

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

  • 42.50.Gy
03.65.Vf (Phases: geometric; dynamic or topological) 32.50.+d (Fluorescence, phosphorescence (including quenching)) 32.80.Qk (Coherent control of atomic interactions with photons) 42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift) 42.50.Nn (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)