Polarization-dependent optical reflection from vertically aligned multiwalled carbon nanotube arrays

Optical reflection from an array of vertically aligned multiwalled carbon nanotubes (MWCNTs) acting as a black body absorber was investigated. We present the novel results of the experimental analysis of specular reflection involving the different light polarization configurations and wavelengths from visible and near infrared range. It was shown that with the increasing incidence angle, reflectance rises dramatically and is highly dependent upon the polarization state of the incoming light. Our results indicate that popular antenna model commonly used for explaining optical properties of MWCNTs must be applied with care when referenced to nanotube arrays.