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New assembly route for three-dimensional metamaterials obtained through effective medium theory |
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 ) |
Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Tianjin University, and Key Laboratory of Optoelectronics Information Technology, Tianjin 300072, China |
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Abstract 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.
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Received: 25 April 2012
Revised: 24 May 2012
Accepted manuscript online:
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PACS:
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61107053, 61138001, and 61007034) and the Tianjin Natural Science Foundation, China (Grant No. 11JCYBJC25900). |
Corresponding Authors:
Han Jia-Guang
E-mail: jiaghan@tju.edu.cn
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Cite this article:
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 ) New assembly route for three-dimensional metamaterials obtained through effective medium theory 2012 Chin. Phys. B 21 117802
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