| Numerical simulations of negative-index refraction in a lamellar composite with alternating single negative layers |
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| 作者姓名： | 董正高 祝世宁 刘 辉 |
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| 作者单位： | National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China;National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| 基金项目： | Project supported by the State Key Program for Basic Research of China (Grant No 2004CB619003), and by the National Natural Science Foundation of China (Grant No 90201008). |
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| 摘 要： | Negative-index refraction is demonstrated in a lamellar composite with epsilon-negative （ENG） and mu-negative （MNG） materials stacked alternatively. Based on the effective medium approximation, simultaneously negative effective permittivity and permeability of such a lamellar composite are obtained theoretically and further proven by full-wave simulations. Consequently, the renowned left-handed metamaterial comprising split ring resonators and wires is interpreted as an analogy of such ENG-MNG layers. In addition, beyond the effective medium approximation, the propagating field squeezed near the ENG/MNG interface is demonstrated to be left-handed surface waves with backward phase velocity.
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| 关 键 词： | 负折射 表面波 数字模拟 介质逼近 |
| 收稿时间： | 2005-11-08 |
| 修稿时间： | 2005-11-082006-04-23 |
Numerical simulations of negative-index refraction in a lamellar composite with alternating single negative layers |
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| Dong Zheng-Gao,Zhu Shi-Ning and Liu Hui.Numerical simulations of negative-index refraction in a lamellar composite with alternating single negative layers[J].Chinese Physics B,2006,15(8):1772-1776. |
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| Authors: | Dong Zheng-Gao Zhu Shi-Ning and Liu Hui |
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| Institution: | National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| Abstract: | Negative-index refraction is demonstrated in a lamellar composite with
epsilon-negative (ENG) and mu-negative (MNG) materials stacked alternatively. Based
on the effective medium approximation, simultaneously negative effective
permittivity and permeability of such a lamellar composite are obtained
theoretically and further proven by full-wave simulations. Consequently, the
renowned left-handed metamaterial comprising split ring resonators and wires is
interpreted as an analogy of such ENG--MNG layers. In addition, beyond the
effective medium approximation, the propagating field squeezed near the ENG/MNG
interface is demonstrated to be left-handed surface waves with backward phase
velocity. |
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| Keywords: | negative refraction left-handed metamaterial surface wave |
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