Design of three-dimensional near-zero refractive index metamaterials.

摘要

Near-zero refractive index metamaterials exhibit remarkable electromagnetic properties which can and will be applied in the near future. From the known methods of achieving near-zero refractive index, this work primarily focuses on the design of 3D metamaterials whose permittivity and permeability are both close to zero while maintaining relatively low loss factor. The design of the metamaterials is based on the chiral shape "omega" and designed to weave periodically as a fishnet. Theoretical analysis, computer modeling and simulation are steps taken in the design of metamaterials. A computational tool based on the robust method for effective parameter extraction is successfully developed and validated in order to examine the effective material parameters. This tool is also employed as a preliminary test for the design of metamaterials. Novel two-dimensional and three-dimensional metamaterial designs which exhibit desirable near-zero refractive index with relatively low loss are developed.