负折射率材料的实现模式及传输衰减分析  

Analysis on Realization Modes and Transmission Attenuation of Negative Refractive Index Materials

作　　者：董焱章[1] 刘书田[2] 

机构地区：[1]湖北汽车工业学院汽车动力传动与电子控制湖北省重点实验室,湖北十堰442002 [2]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《湖北汽车工业学院学报》2016年第2期43-48,共6页Journal of Hubei University Of Automotive Technology

基　　金：国家自然科学基金(11502075;11504102);湖北省自然科学基金(2014CFB629);湖北汽车工业学院博士科研启动基金(BK201501)

摘　　要：推导了均匀材料折射率完整的解析表达式,并基于此按照材料导磁性、导电性和介电性的不同情形讨论了电磁波的传输模式,结果表明材料的导磁性和介电性是负折射率的必要条件;进而得到了实现负折射率的3种可能情形,即磁导率和介电常数至少一个参数为负值,与此同时传输衰减上升为负折射率材料的新挑战;虽然材料的导电性不是负折射率的决定因素,但导电性与材料的传输衰减关系密切。此外也探讨了零折射率材料的凋落波传输模式。The complete analytical expression of the refractive index was theoretically derived. Based onthe expression, the transmission modes of electromagnetic wave were discussed in terms of different cas-es about permeability, conductivity and dielectricity. The results show that the permeability and dielec-tricity are necessary conditions of the negative refractive index; then three possible cases are obtainedto generate a negative refractive index, that is at least permeability or permittivity is negative. At thesame time, the transmission attenuation becomes a new challenge of the negative refractive index mate-rials. The conductivity is not a determining factor of the negative refractive index. However, there is aclose relation between the conductivity and transmission attenuation. In addition, the transmissionmodes of the evanescent waves from the zero refractive index materials were discussed.

关 键 词：负折射率 零折射率 传输衰减 左手材料 超材料设计 

分 类 号：O441[理学—电磁学]