Chin. Phys. Lett.  2007, Vol. 24 Issue (1): 108-111    DOI:
Original Articles |
Controllable Optical Bistability and Multistability in a Four-Level Atomic System with Closed-Loop Configuration
Lü Xin-You;LI Jia-Hua;LIU Ji-Bing
Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
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Lü Xin-You, LI Jia-Hua, LIU Ji-Bing 2007 Chin. Phys. Lett. 24 108-111
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Abstract We theoretically investigate optical bistability (OB) and multistability (OM) behaviour of a closed-loop configuration atomic system driven by a degenerate coupling field and a degenerate probe field inside a unidirectional ring cavity. It is found that the OB and OM behaviour can be controlled by adjusting the intensity and the frequency detuning of the coupling field, respectively. Interestingly, our numerical results show that it is easy to realize the transition from OB to OM or vice versa by adjusting the intensity of the coupling field under a appropriate frequency detuning. The effect of the atomic cooperation parameter on the OB behaviour is also discussed.
Keywords: 42.50.Gy      42.65.Pc      42.50.Md     
Published: 01 January 2007
PACS:  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
  42.65.Pc (Optical bistability, multistability, and switching, including local field effects)  
  42.50.Md (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2007/V24/I1/0108
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