We study the multiband left-handed properties under the electromagnetic wave normal incidence with two polarizations, and analyze the mechanism of the multiband negative refraction. 我们讨论了垂直入射的电磁波在两种极化的情况下超材料的多通带左手特性,并且详细分析了多通带左手特性的产生机制。
The propagation of electromagnetic wave in uniaxially anisotropic left-handed material has to be in a certain space. it is to say, the angle between wave vector and optical axis must meet a certain condition. 电磁波在单轴各向异性左手材料中传播需在一定范区域之内,即波矢和光轴夹角必须满足一定条件传播才能发生。