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论文类型：期刊论文

发表时间：2011-01-01

发表刊物：JOURNAL OF OPTICS

收录刊物：SCIE、EI、Scopus

卷号：13

期号：1

ISSN号：2040-8978

关键字：left-handed metamaterials; material design; relative bandwidth; S-parameters retrieval methods; sequential quadratic programming; split-ring resonators

摘要：Due to their special properties, left-handed metamaterials have important potential applications in engineering. When an incident wave propagates through a periodic material with the dimension of its microstructure much smaller than the wavelength, the metamaterial can be regarded as a homogeneous medium, and its effective electromagnetic parameters (permittivity and permeability) in the frequency domain can be obtained with the S-parameters retrieval method. From this perspective, the design of a material with the desired left-handed characteristics becomes possible. By establishing automatic parametric modeling technology, we can study the transmission and reflection properties of left-handed metamaterials with arrays of split-ring resonators. Next, a whole flow chart of design optimization for improving left-handed metamaterial performance is proposed. Finally, the design method is illustrated through a numerical example including the shape and the size design of split-ring resonators to max relative bandwidth, based on parametric analysis of the left-handed relative bandwidths. Sequential quadratic programming and enumeration optimization are applied to solve the optimization problem.