| Negative Refractive Index in a Four-Level Atomic System |
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| 作者姓名： | 张红军 龚尚庆 钮月萍 李儒新 徐至展 |
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| 作者单位： | [1]State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800 [2]Graduate School of Chinese Academy of Sciences, Beijing 100049 [3]School of Physics and Information Technology, Shaanxi Normal University, Xi＇an 710062 |
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| 基金项目： | Supported by the National Natural Science Foundation of China Foundation of Shanghai under Grant Nos 04JC14036 and 05DJ14003 |
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| 摘 要： |
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| 关 键 词： | 负折射 四层原子系统 渗透性 光频率范围 |
| 收稿时间： | 2006-03-01 |
| 修稿时间： | 2006-03-01 |
Negative Refractive Index in a Four-Level Atomic System |
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| ZhANG Hong-Jun, GONG Shang-Qing, NIU Yue-Ping, LI Ru Xin, XU Zhi-Zhan.Negative Refractive Index in a Four-Level Atomic System[J].Chinese Physics Letters,2006,23(7):1769-1772. |
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| Authors: | ZhANG Hong-Jun GONG Shang-Qing NIU Yue-Ping LI Ru Xin XU Zhi-Zhan |
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| Abstract: | We propose a scheme for realizing negative refractive index in a four-level atomic system. It is shown that such a system can simultaneously exhibit negative permittivity and negative permeability in an optical frequency range. Furthermore, by analysing the dispersion property of the left-handed material, we lind that the probe beam can be controlled from superluminal to subluminal or vice versa via choosing appropriate parameters. |
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