中国物理B ›› 2012, Vol. 21 ›› Issue (11): 117802-117802.doi: 10.1088/1674-1056/21/11/117802
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
臧元章, 何明霞, 谷建强, 田震, 韩家广
Zang Yuan-Zhang (臧元章), He Ming-Xia (何明霞), Gu Jian-Qiang (谷建强), Tian Zhen (田震), Han Jia-Guang (韩家广 )
摘要: In this study, we illustrate the effective medium theories in the designs of three-dimensional composite metamaterials of both negative permittivity and negative permeability. The proposed metamaterial consists of random coated spheres with sizes smaller compared to the wavelength embedded in a dielectric host. Simple design rules and formulas following the effective medium models are numerically and analytically presented. We demonstrate that the revised Maxwell-Garnett effective medium theory enables us to design three-dimensional composite metamaterials through the assembly of the coated spheres which are random and much smaller than the wavelength of the light. The proposed approach allows for the precise control of the permittivity and the permeability and guides a facile, flexible, and versatile way for the fabrication of composite metamaterials.
中图分类号: (Multilayers; superlattices; photonic structures; metamaterials)