A rational design of microwire/CNT hybrid fiber for tunable microwire metacomposites

TL;DR

This paper presents a novel hybrid microwire/CNT fiber design for tunable metacomposites, demonstrating how CNT coating influences electromagnetic properties like plasma frequency and negative refraction.

Contribution

It introduces a rational design approach for hybrid microwire/CNT fibers, elucidating the role of CNT coating in tuning electromagnetic responses of metacomposites.

Findings

CNT coating thickness affects plasma frequency and bandwidth.

The role of CNT in modulating negative permittivity and permeability is clarified.

The design enables tunable electromagnetic properties in 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 {\epsilon} and {\mu} is elucidated by the plasma frequency formula and split-close paths model based on the layer-like structure of CNT coating.