Phase effects on group velocity propagation in a V-type system with spontaneously generated coherence |
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| Authors: | Dingan Han Yaguang Zeng Yanfeng Bai Weicheng Chen Hong Lu |
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| Affiliation: | 1. Physics Department , Foshan University , Foshan, Guangdong Province, 528000, P. R. China handingan@yahoo.com.con;3. Physics Department , Foshan University , Foshan, Guangdong Province, 528000, P. R. China;4. Key Laboratory for Quantum Optics and Center for Cold Atom Physics , Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences , Shanghai 201800, China |
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| Abstract: | The effects of the relative phase between two laser beams on the propagation of a weak electromagnetic pulse are investigated in a V-type system with spontaneously generated coherence (SGC). Due to the relative phase, the subluminal and superluminal group velocity can be unified. Meanwhile, SGC can be regarded as a knob to manipulate light propagation between subluminal and superluminal. |
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