We retrieve the complex optical index of single-walled carbon nanotube (CNT) films in the 0.6–800 μm spectral range. Results are obtained from a complete set of optical measurements, reflection and transmission, of free-standing CNT films using time domain spectroscopy in the terahertz (THz) and Fourier transform infrared (IR) spectroscopy in the visible–IR. Based on a Drude–Lorentz model, our results reveal a global metallic behavior of the films in the IR, and confirm their high optical index in the THz range.
© 2012 Optical Society of America
Original Manuscript: February 7, 2012
Revised Manuscript: March 9, 2012
Manuscript Accepted: March 12, 2012
Published: May 18, 2012
Sylvain Maine, Charlie Koechlin, Stéphanie Rennesson, Julien Jaeck, Simon Salort, Bruno Chassagne, Fabrice Pardo, Jean-Luc Pelouard, and Riad Haïdar, "Complex optical index of single wall carbon nanotube films from the near-infrared to the terahertz spectral range," Appl. Opt. 51, 3031-3035 (2012)