Analytical approach to optical absorption in carbon nanotubes

Ermin Malić, Matthias Hirtschulz, Frank Milde, Andreas Knorr, and Stephanie Reich
Phys. Rev. B 74, 195431 – Published 27 November 2006; Erratum Phys. Rev. B 76, 039901 (2007)

Abstract

We derive an analytic expression for the optical matrix elements of carbon nanotubes and calculate their optical absorption spectra within the tight-binding approximation. For zigzag nanotubes we present an analytical result for the absorption coefficient. Metallic nanotubes have an optical band gap regardless of their chiral angle. The optical absorption intensity increases by up to 10% from zigzag to armchair nanotubes. This trend is in agreement with experiment, although its magnitude is underestimated. We predict a strong absorption peak in the high-energy spectra of certain zigzag nanotubes that can be used to identify the tubes experimentally.

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  • Received 10 July 2006

DOI:https://doi.org/10.1103/PhysRevB.74.195431

©2006 American Physical Society

Erratum

Erratum: Analytical approach to optical absorption in carbon nanotubes [Phys. Rev. B 74, 195431 (2006)]

Ermin Malić, Matthias Hirtschulz, Frank Milde, Andreas Knorr, and Stephanie Reich
Phys. Rev. B 76, 039901 (2007)

Authors & Affiliations

Ermin Malić1,*, Matthias Hirtschulz2, Frank Milde2, Andreas Knorr2, and Stephanie Reich1

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA
  • 2Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Technische Universität Berlin, 10623 Berlin, Germany

  • *Electronic address: malic@mit.edu

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Issue

Vol. 74, Iss. 19 — 15 November 2006

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