一种新型网状结构的零折射率超材料

提出了一种由方形金属环、方形金属片及十字形金属线组成的网状零折射率电磁超材料结构.通过CST仿真计算其传输参数，利用电磁参数反演算法得到结构的等效电磁参数.结果表明，当电磁波垂直入射时，该结构在11.54 GHz附近其等效介电常数、等效磁导率同时接近零，在该频点附近处折射率为零， 实验测试与仿真结果基本一致.通过棱镜仿真研究验证，该结构在该频点处可从负折射区域向正折射区域转换，说明该结构是具有“负-零-正”折射率的平衡结构.

Metamaterials with zero refractive index produced using a novel fishnet structures

A fishnet structure of zero-index metamaterial composed of a square metal ring， square pieces of metal and cross wire is proposed. The simulation calculation and retrieved results indicate that the effective permittivity and permeability of the proposed structure close to 0 at the frequency of 11.54GHz when normal linearly polarized wave incidence directly， and the experimental results coincide with the simulation results. Through a prism simulation， the simulation calculation results support the idea of where the zero-index frequency point should be generated， the transition from a negative-n region to a positive-n region. Thus， the result demonstrates that the proposed structure indeed exhibits a balanced property with a negative-zero-positive behavior.