中国物理B ›› 2008, Vol. 17 ›› Issue (4): 1269-1273.doi: 10.1088/1674-1056/17/4/020

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Sideband manipulation of population inversion in a three-level Λ atomic system

郭洪菊, 钮月萍, 金石琦, 龚尚庆   

  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China
  • 收稿日期:2007-09-08 修回日期:2007-10-08 出版日期:2008-04-20 发布日期:2008-04-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 60708008), the Project of Academic Leaders in Shanghai, China (Grant No 07XD14030) and the Knowledge Innovation Program of the Chinese Academy of Sciences.

Sideband manipulation of population inversion in a three-level $\Lambda$ atomic system

Guo Hong-Ju(郭洪菊), Niu Yue-Ping(钮月萍), Jin Shi-Qi(金石琦), and Gong Shang-Qing(龚尚庆)†   

  1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2007-09-08 Revised:2007-10-08 Online:2008-04-20 Published:2008-04-01
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 60708008), the Project of Academic Leaders in Shanghai, China (Grant No 07XD14030) and the Knowledge Innovation Program of the Chinese Academy of Sciences.

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摘要： Sideband manipulation of population inversion in a three-level $\Lambda$ atomic configuration is investigated theoretically. Compared with the case of a nearly monochromatic field, a population inversion between an excited state and a ground state has been found in a wide sideband intensity range by increasing the difference in frequency between three components. Furthermore, the population inversion can be controlled by the sum of the relative phases of the sideband components of the trichromatic pump field with respective to the phase of the central component. Changing the sum phase from 0 to $\pi$, the population inversion between the excited state and the ground state can increase within nearly half of the sideband intensity range. At the same time, the sideband intensity range that corresponds to the system exhibiting inversion $\rho_{00}>\rho_{11}$ also becomes wider evidently.

关键词: population inversion, sideband manipulation, relative phase

Abstract: Sideband manipulation of population inversion in a three-level $\Lambda$ atomic configuration is investigated theoretically. Compared with the case of a nearly monochromatic field, a population inversion between an excited state and a ground state has been found in a wide sideband intensity range by increasing the difference in frequency between three components. Furthermore, the population inversion can be controlled by the sum of the relative phases of the sideband components of the trichromatic pump field with respective to the phase of the central component. Changing the sum phase from 0 to $\pi$, the population inversion between the excited state and the ground state can increase within nearly half of the sideband intensity range. At the same time, the sideband intensity range that corresponds to the system exhibiting inversion $\rho_{00}>\rho_{11}$ also becomes wider evidently.

Key words: population inversion, sideband manipulation, relative phase

中图分类号:  (Quantum optics)

  • 42.50.-p