The Effect of Phase Fluctuation on Electromagnetically Induced Transparency,Inversionless Lasing and Refractive Index Enhancement in a Λ System |
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| Authors: | Shang-Qing Gong Zhi-Zhan Xu Shao-Hua Pan |
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| Affiliation: | 1. Shanghai Institute of Optics and Fine Mechanics , Chinese Academy of Sciences , P.O. Box 800211, P.R. China;2. Shanghai Institute of Optics and Fine Mechanics , Chinese Academy of Sciences , P.O. Box 800211, P.R. China;3. China Centre of Advanced Science and Technology (World Laboratory) , P.O. Box 8730, Beijing, 100080, P.R. China;4. Institute of Physics , Chinese Academy of Sciences , Beijing, 100080, P.R. China |
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| Abstract: | Abstract The steady-state behaviour for a Λ-type, three-level atomic system has been analysed by taking into account the effect of the phase fluctuation. It is shown that, for a monochromatic driving field, even if the probe field is in resonance with the corresponding atomic transition, a large refraction index can still be generated; for a finite linewidth of the driving field, inversionless lasing and index enhancement tends to disappear. Furthermore, the linewidth prevents the transparency of the medium. |
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