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Controllable Kerr Nonlinearity with Perfect Transparency in the Existence of Spontaneously Generated Coherence |
| NIU Yue-Ping;GONG Shang-Qing;LI Ru-Xin;XU Zhi-Zhan |
| State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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NIU Yue-Ping, GONG Shang-Qing, LI Ru-Xin et al 2008 Chin. Phys. Lett. 25 540-543 |
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Abstract We investigate the Kerr nonlinearity of a V-type three-level atomic system where the upper two states decay outside to another state and hence spontaneous generated coherence may exist. It is shown that dark state and hence perfect transparency present under certain conditions. Meanwhile, the Kerr nonlinearity can be controlled by manipulation of the decay rates and the splitting of the two excited states. Therefore, enhanced Kerr nonlinearity without absorption can be obtained under proper parameters.
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| Keywords:
42.65.-k
42.50.Ar
42.50.Gy
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Received: 07 September 2007
Published: 30 January 2008
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| PACS: |
42.65.-k
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(Nonlinear optics)
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42.50.Ar
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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