| 用具有负介电常数的模拟光子晶体同轴系统获得负群速 |
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| 引用本文： | 姜荣,黄志洵. 用具有负介电常数的模拟光子晶体同轴系统获得负群速[J]. 中国传媒大学学报, 2013, 0(5): 20-23 |
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| 作者姓名： | 姜荣 黄志洵 |
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| 作者单位： | 中国传媒大学信息工程学院,北京,100024;中国传媒大学信息工程学院,北京,100024 |
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| 摘 要： | 研究由不同阻抗的同轴电缆周期相连组成的同轴光子晶体（coaxial photon crystal,CPC）系统中的反常色散曲线和群速。研究了阻抗的大小,每段同轴线的长度,系统中同轴电缆的节数,和同轴电缆自身的折射率对反常色散曲线和群速的影响;并且得到vg=3．25c的最大群速。最后假定使用具有负介电常数填充物的同轴电缆组成CPC,证明可获得vg=（-5．04c）～（-5．23c）。
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| 关 键 词： | 同轴光子晶体(CPC) 超光速群速 负群速 |
Used Analogue Coaxial Photon Crystal with Negative Permittivity to Obtain Negative Group Velocity |
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| JIANG Rong,HUANG Zhi-xun. Used Analogue Coaxial Photon Crystal with Negative Permittivity to Obtain Negative Group Velocity[J]. Journal of Communication University of China Science and TEchnology, 2013, 0(5): 20-23 |
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| Authors: | JIANG Rong HUANG Zhi-xun |
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| Affiliation: | ( Information Engineering School, Communication University of China, Beijing 100024, China) |
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| Abstract: | Anomalous dispersion and group velocity of coaxial photon crystal （CPC）were researched, which compose of coaxial cable with different impedance connected periodically. And it was discussed that the different impedances of coaxial cable, the length of each coaxial cable, the number of tile coaxial cable, and the refractive index of coaxial cable exercise an influence on anomalous dispersion curves and group velocity, and the most group velocity vg = 3. 25c was obtained. Finally, the coaxial cable with hypothetical negative permittivity was used to form CPC, and it was evidenced that vg = （ -5.04c ） （-5.23c） was obtained. |
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| Keywords: | coaxial photon crystal （CPC） superluminal group velocity negative group velocity |
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