Controlling the group velocity in a five-level K-type atomic system |
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| Authors: | Dingan Han Yaguang Zeng Hui Cao Chunqing Huang |
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| Affiliation: | a Department of Physics, Foshan University, No. 18, Jiangwang 1 Road, Foshan, Guangdong 528000, PR China
b Key Laboratory for Quantum Optics and Center for Cold Atom Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, PR China |
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| Abstract: | The properties of a five-level K-type system are investigated. With the controlling fields, the properties of the dispersion and absorption of the system are changed greatly. The system can produce anomalous dispersion regions with absorption and normal dispersion regions with absorption or transparency. Furthermore, the group velocity can be varied from subluminal to superluminal by varying the intensity of the controlling field and the probe detunings in principle. |
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