| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Phase grating in a doubly degenerate four-level system |
| Liu Yun (刘云), Wang Pu (王朴), Peng Shuang-Yan (彭双艳) |
| College of Physics Science and Technology, Bijie University, Bijie 551700, China |
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Abstract In this paper, we suggest a doubly degenerate four-level system, in which the transition takes place between the hyperfine energy 52S1/2 F=1 and 52P3/2 F=2 in rubidium 87 D2 line, for studying atomic phase grating based on the cross-Kerr and phase conjugation effects. The phase grating with high efficiency can be obtained by tuning phase shift Φ between the coupling and probe field, when the coupling intensity is much stronger than the strength of probe field. Under different coupling intensities, a high diffraction efficiency can be maintained. A new and simple way of implementing phase grating is presented. However, in such an atomic system, two main limitations must be taken into account. First, the independence between steady state probe susceptibility and the coupling intensity, when the population decay rate is larger than the Rabi frequency of the coupling field, cannot result in diffraction grating; second, the sample to be prepared should not be too long.
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Received: 06 December 2013
Revised: 17 June 2013
Accepted manuscript online:
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PACS:
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42.50.Ex
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(Optical implementations of quantum information processing and transfer)
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| Fund: Project supported by the Joint Fund for Science and Technology of Bijie University, Science and Technology Bureau of Bijie City, Science and Technology Department of Guizhou Province (Grant No. J-LKB [2013] 17), and the China Postdoctoral Science Foundation (Grant No. 2011M500951). |
Corresponding Authors:
Liu Yun
E-mail: liuyun0865@163.com
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Cite this article:
Liu Yun (刘云), Wang Pu (王朴), Peng Shuang-Yan (彭双艳) Phase grating in a doubly degenerate four-level system 2013 Chin. Phys. B 22 104203
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