Dong Z G, Zhu S N, Liu H, Zhu J, Cao W
National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jul;72(1 Pt 2):016607. doi: 10.1103/PhysRevE.72.016607. Epub 2005 Jul 12.
A wedge-shaped structure made of split-ring resonators (SRR) and wires is numerically simulated to evaluate its refraction behavior. Four frequency bands, namely, the stop band, left-handed band, ultralow-index band, and positive-index band, are distinguished according to the refracted field distributions. Negative phase velocity inside the wedge is demonstrated in the left-handed band and the Snell's Law is conformed in terms of its refraction behaviors in different frequency bands. Our results confirmed that negative index of refraction indeed exists in such a composite metamaterial and also provided a convincing support to the results of previous Snell's Law experiments.
对一种由裂环谐振器（SRR）和金属线构成的楔形结构进行了数值模拟，以评估其折射行为。根据折射场分布区分出四个频段，即阻带、左手频段、超低频段和正折射率频段。在左手频段中证明了楔形结构内部存在负相速度，并且在不同频段的折射行为方面符合斯涅尔定律。我们的结果证实了在这种复合超材料中确实存在负折射率，也为先前斯涅尔定律实验的结果提供了令人信服的支持。
