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Abstract: Carbon nanomaterials, such as carbon nanotube and graphene, have attracted substantial interest in the electromagnetic domain due to their excellent electronical properties. The previous studies were mainly focusing on high frequencies, such as terahertz (THz), infrared, and optical frequencies. However, the carbon nanomaterials also show potential applications in the microwave, millimeter wave, and sub-THz frequency domains. In this report, the presenter will mainly introduce his research work on graphene and carbon nanotube for the frequencies below 1 THz in the millimeter wave and THz lab of Vrije Universiteit Brussel. Numerical method finite-difference time-domain (FDTD) modelling graphene is firstly introduced. With the numerical method, electromagnetic modulation properties of graphene in waveguide structures and free-space are investigated in the millimetre wave and sub-THz frequencies. Two practical electromagnetic applications utilizing the electromagnetic modulation properties are presented later. In the last, the research work on another carbon nanomaterial¡ªcarbon nanotube is demonstrated, which is identifying the anisotropy in seemingly random carbon nanotube networks with THz technique. This investigation shows the potential application of THz technique on characterization of nanomaterials.

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