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2002 Volume 11 Issue 4
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Yang Xi-Hua(杨希华), Sun Zhen-Rong(孙真荣), Ding Liang-En(丁良恩), Wang Zu-Geng(王祖赓). 2002: Constructive interference via collision-aided radiative excitation, Chinese Physics B, 11(4): 346-351.
Citation: Yang Xi-Hua(杨希华), Sun Zhen-Rong(孙真荣), Ding Liang-En(丁良恩), Wang Zu-Geng(王祖赓). 2002: Constructive interference via collision-aided radiative excitation, Chinese Physics B, 11(4): 346-351.
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Constructive interference via collision-aided radiative excitation

  • Key Laboratory of Optical and Magnetic Resonance Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062, China

  • Available Online: 30/04/2002
  • Fund Project: the National Natural Science Foundation of China (Grant 19734003 and 10074015)
  • We have studied theoretically constructive interference via collision-aided radiative excitation in an open fourlevel system using a density matrix approach. The four-level system consists of a A-type three-level quantum-beat configuration driven by one laser field and a fourth level coupled by a vacuum mode. It is shown that through the incoherent process (collision), coherence between widely-separated doublets and subsequent constructive interference can be realized. We analyse the effects of the collisio-induced coherent and incoherent decay rates, laser intensity, and energy separation of the doublets on the interference.Meanwhile, the constructive interference between the two transition pathways 3P1/2-4D and 3P3/2-4D via equal-frequency hybrid excitation and collision-aided radiative excitation in an Na2-Na system is experimentally observed. A good agreement between the theoretical and experimental results is obtained.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Constructive interference via collision-aided radiative excitation

  • Available Online: 30/04/2002

Abstract: We have studied theoretically constructive interference via collision-aided radiative excitation in an open fourlevel system using a density matrix approach. The four-level system consists of a A-type three-level quantum-beat configuration driven by one laser field and a fourth level coupled by a vacuum mode. It is shown that through the incoherent process (collision), coherence between widely-separated doublets and subsequent constructive interference can be realized. We analyse the effects of the collisio-induced coherent and incoherent decay rates, laser intensity, and energy separation of the doublets on the interference.Meanwhile, the constructive interference between the two transition pathways 3P1/2-4D and 3P3/2-4D via equal-frequency hybrid excitation and collision-aided radiative excitation in an Na2-Na system is experimentally observed. A good agreement between the theoretical and experimental results is obtained.

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