J4 ›› 2011, Vol. 28 ›› Issue (3): 253-261.

• Review •     Next Articles

Progress of weak-light nonlinearities based on electromagnetically induced transparency

OU Yang-Qiu-Yun1,2, ZHANG Yun-Dong1, YUAN Ping1   

  1. 1 National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150080, China; 
    2 College of Science, Harbin Engineering University, Harbin 150001, China
  • Published:2011-05-28 Online:2011-05-20

Abstract:

It is important to obtain strong nonlinearities under the conditions of the weak-light through electromagnetically induced transparency (EIT), which opens up a new field about optical nonlinearities, named as weak-light nonlinearity. Kerr nonlinearities and four-wave mixing based on electromagnetically induced transparency are introduced. Kerr nonlinearities may be used on the all-optical switches and all-optical logical arithmetic and optical quantum logical gate and so on. Four-wave mixing effects also have many applications. The most important application is that it can expand the frequency of coherent light to infrared and ultraviolet spectrum. In the case of the degeneration, four-wave mixing effects are useful for wavefront reconstruction in the adaptive optics. Besides, in material research, the resonant four-wave mixing technique is a vigorous spectrum analyzing tool.

Key words: nonlinear optics, weak-light nonlinearity, electromagnetically induced transparency, Kerr nonlinearity, four-wave mixing

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