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Polarization anisotropy of transient carrier and phonon dynamics in carbon nanotubes

J. Appl. Phys. 105, 103506 (2009); doi:10.1063/1.3126715

Published 20 May 2009

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Ji-Hee Kim,1 Jaegyu Park,1 Bong Yeon Lee,1 Donghan Lee,1 Ki-Ju Yee,1 Yong-Sik Lim,2 Layla G. Booshehri,3 Erik H. Hároz,3 Junichiro Kono,3 and Sung-Hoon Baik4
1Department of Physics, Chungnam National University, Daejeon 305-764, Republic of Korea
2Department of Applied Physics, Konkuk University, Chungbuk 380-701, Republic of Korea
3Department of Electrical and Computer Engineering, Rice University, Houston, Texas 77005, USA
4Quantum Optics Research Division, Korea Atomic Energy Research Institute, Daejeon 305-353, Republic of Korea
We report on polarization-dependent transient carrier dynamics and coherent phonon oscillations in single-walled carbon nanotubes by determining the relation between the nanotube axis and the incident light polarization. Due to the anisotropic shape of nanotubes, optical absorption strongly depends on the polarization direction. We observed three decay components when the excitation wavelength was resonant with the E22 transition energy and observed two-decay components under off-resonance conditions. The transient absorption and coherent phonon amplitudes were measured as a function of the angle between the pump and probe polarizations and were analyzed based on the absorption anisotropy of carbon nanotubes. ©2009 American Institute of Physics
History: Received 5 January 2009; accepted 3 April 2009; published 20 May 2009
Permalink: http://link.aip.org/link/?JAPIAU/105/103506/1
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KEYWORDS and PACS

Keywords
PACS
  • 63.22.Gh
    Phonons and vibrational states in nanotubes and nanowires
  • 78.67.Ch
    Optical properties of nanotubes
  • YEAR: 2009

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ISSN:
0021-8979 (print)   1089-7550 (online)
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