Refractive index evaluation of multi-walled carbon nanotube arrays

Katsounaros, A and Rajab, KZ and Hou, K and Mann, M and Naftaly, M and Collings, N and Crossland, WA and Hao, Y (2010) Refractive index evaluation of multi-walled carbon nanotube arrays. EuCAP 2010 - The 4th European Conference on Antennas and Propagation.

Abstract

Transmission terahertz time-domain spectroscopy (THz-TDS) measurements of carbon nanotube arrays are presented. A relatively thin film with vertically aligned multi-walled carbon nanotubes has been prepared and measured using THz-TDS. Experimental results were obtained from 80GHz to 2.5THz, and the sample has been characterized by extracting the relative permittivity of the carbon nanotubes. A combination of the Maxwell-Garnett and Drude models within the frequency range provide a good fit to the measured permittivity.