A rational design of microwire/CNT hybrid fiber for tunable microwire metacomposites
Abstract
Metacomposites are a type of engineering composite materials with metamaterial properties. We propose a design of hybrid filler consisting of ferromagnetic microwire and carbon nanotube to enable a tunable microwire metacomposite. There shows a sophisticated dependency of plasma frequency and bandwidth of double negative region on the carbon nanotube coating. Factors such as coating thickness, uniformity, morphology and number of microwires conspire to the formulation of the double negative characteristics. The intricate role of CNT on modulating negative ε and μ is elucidated by the plasma frequency formula and split-close paths model based on the layer-like structure of CNT coating.
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