title: Polarization dependence of the optical absorption of single-walled carbon nanotubes.
abstract: Anisotropic optical absorption properties of single-walled carbon nanotubes (SWNTs) are determined from a vertically aligned SWNT film for 0.5-6 eV. Absorption peaks at 4.5 and 5.25 eV are found to exhibit remarkable polarization dependence and have relevance to optical properties of graphite. A method for determining a nematic order parameter for an aligned SWNT film based on the collinear absorption peak at 4.5 eV is presented, followed by the determination of the optical absorption cross section.
authors.affiliation: Department of Mechanical Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. murayami@photon.t.u-tokyo.ac.jp
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Murakami
authors.forename: Erik
authors.initials: E
authors.lastname: Einarsson
authors.forename: Tadao
authors.initials: T
authors.lastname: Edamura
authors.forename: Shigeo
authors.initials: S
authors.lastname: Maruyama