Strong Anisotropy in the Far-Infrared Absorption Spectra of Stretch-Aligned Single-Walled Carbon Nanotubes


  • Work at Tohoku University is partially supported by a grant from the Ministry of Education, Culture, Sport, Science, and Technology, Japan (17204022, 17069003, and 16076201). Work at UT is supported by the Division of Materials Science at the National Science Foundation (DMR-0139414). We thank Y. Sakakibara, T. Nakanishi, and D. B. Tanner for useful discussions.


original image

Absorption spectroscopy of stretch-aligned single-walled carbon nanotube (SWNT)/polymer composite films from the terahertz through the visible region of the electromagnetic spectrum reveal that the peak centered near 100 cm–1 is highly polarized along the tube axis (see figure). This result provides new information on the morphology-dependent low-energy response of SWNTs, and may predict application of SWNTs in the terahertz region.