| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Absorption-Free Sub- and Super-Luminal Light Propagation via Quantum Interference |
| WU Jian-Chun1,2**, LIU Zheng-Dong1,2, ZHENG Jun1,2 |
1Department of Physics, Nanchang University, Nanchang 330031
2Engineering Research Center for Nanotechnology, Nanchang University, Nanchang 330047
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| Cite this article: |
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WU Jian-Chun, LIU Zheng-Dong, ZHENG Jun 2012 Chin. Phys. Lett. 29 104201 |
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Abstract We investigate the dispersive and absorptive properties of an N-type four-level atomic system in three coherent fields, and consider the susceptibility mathematically. It is shown that the group velocity of the probe field exhibits sub- and super-luminal under some conditions, meanwhile the absorption coefficient keeps zero during the occurrence and transition process of sub- and super-luminal pulses.
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Received: 21 June 2012
Published: 01 October 2012
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| PACS: |
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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42.25.Bs
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(Wave propagation, transmission and absorption)
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