Optical conductivity of single walled nanotube films in Terahertz region

A theoretical investigation for the conductivity of single walled nanotube films is carried out with an effective medium model in Terahertz region. The results are compared with the recent experiment and a decrease of the real conductivity with increasing frequency is predicted. Meanwhile, the off-diagonal components of the dielectric function of single-walled carbon nanotube films based on the magneto-optical effects are also shown.