各向异性超常介质中的反常线性现象
Anomalous linear phenomena of anisotropic metamaterial
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摘要: 从麦克斯韦方程组出发，结合超常介质的特殊性质，分析了电磁波在一种具有线性色散关系的各向异性超常介质中的传播特性。在线性色散关系的情况下，得到了超常介质的介电张量和磁导率张量各元素之间的条件表达式。根据能量守恒定律和电磁场的边界连续性条件，在横电波(TE)和横磁波(TM)入射时，分析了折射波矢和能流与入射波矢和能流方向之间的关系。发现无论是TE波还是TM波,在这种介质中传输时，都产生了光准直的现象，且TE波和TM波的传输方式是相反的。Abstract: An anisotropic metamaterial with linear dispersion relation was investigated according to Maxwell equations. Based on the linear dispersion, the relation between the elements of dielectric tensor and permeability tensor was obtained. According to the law of conservation of energy and boundary conditions of electromagnetic field, the propagation direction of wave vector and energy flow between the incident and refractive wave was researched. Light collimation, takes place when TE or TM wave propagates in this anisotropic metamaterial, and the propagation ways of TE and TM are opposite to each other.
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Key words:
- metamaterial /
- anisotropic /
- linear dispersion /
- light collimation
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