• Rapid Communication

Collective antenna effects in the terahertz and infrared response of highly aligned carbon nanotube arrays

L. Ren, Q. Zhang, C. L. Pint, A. K. Wójcik, M. Bunney, Jr., T. Arikawa, I. Kawayama, M. Tonouchi, R. H. Hauge, A. A. Belyanin, and J. Kono
Phys. Rev. B 87, 161401(R) – Published 2 April 2013

Abstract

We study macroscopically aligned single-wall carbon nanotube arrays with uniform lengths via polarization-dependent terahertz and infrared transmission spectroscopy. Polarization anisotropy is extreme at frequencies less than 100 cm1 with no sign of attenuation when the polarization is perpendicular to the alignment direction. The attenuation for both parallel and perpendicular polarizations increases with increasing frequency, exhibiting a pronounced and broad peak around 450 cm1 in the parallel case. We model the electromagnetic response of the sample by taking into account both radiative scattering and absorption losses. We show that our sample acts as an effective antenna due to the high degree of alignment, exhibiting much larger radiative scattering than absorption in the mid/far-infrared range. Our calculated attenuation spectrum clearly shows a non-Drude peak at 450 cm1 in agreement with the experiment.

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  • Received 8 January 2013

DOI:https://doi.org/10.1103/PhysRevB.87.161401

©2013 American Physical Society

Authors & Affiliations

L. Ren1, Q. Zhang1, C. L. Pint2,3, A. K. Wójcik4, M. Bunney, Jr.5,6, T. Arikawa1, I. Kawayama7, M. Tonouchi7, R. H. Hauge2, A. A. Belyanin4, and J. Kono1,8,*

  • 1Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA
  • 2Department of Chemistry, Rice University, Houston, Texas 77005, USA
  • 3Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37240, USA
  • 4Department of Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA
  • 5NanoJapan Program, Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA
  • 6Department of Electrical Engineering, Cornell University, Ithaca, New York 14850, USA
  • 7Institute of Laser Engineering, Osaka University, Yamadaoka 2-6, Suita, Osaka 565-0871, Japan
  • 8Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA

  • *Author to whom all correspondence should be addressed: kono@rice.edu

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Issue

Vol. 87, Iss. 16 — 15 April 2013

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