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Titova LV, Pint CL, Zhang Q, et al. Generation of terahertz radiation by optical excitation of aligned carbon nanotubes. Nano Lett. 2015;15(5):3267-72doi: 10.1021/acs.nanolett.5b00494.
Titova, L. V., Pint, C. L., Zhang, Q., Hauge, R. H., Kono, J., & Hegmann, F. A. (2015). Generation of terahertz radiation by optical excitation of aligned carbon nanotubes. Nano letters, 15(5), 3267-72. https://doi.org/10.1021/acs.nanolett.5b00494
Titova, Lyubov V, et al. "Generation of terahertz radiation by optical excitation of aligned carbon nanotubes." Nano letters vol. 15,5 (2015): 3267-72. doi: https://doi.org/10.1021/acs.nanolett.5b00494
Titova LV, Pint CL, Zhang Q, Hauge RH, Kono J, Hegmann FA. Generation of terahertz radiation by optical excitation of aligned carbon nanotubes. Nano Lett. 2015 May 13;15(5):3267-72. doi: 10.1021/acs.nanolett.5b00494. Epub 2015 Apr 20. PMID: 25879274.
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Nano Lett. 2015 May 13;15(5):3267-72. doi: 10.1021/acs.nanolett.5b00494. Epub 2015 Apr 20.

Generation of terahertz radiation by optical excitation of aligned carbon nanotubes.

Nano letters

Lyubov V Titova, Cary L Pint, Qi Zhang, Robert H Hauge, Junichiro Kono, Frank A Hegmann

Affiliations

  1. †Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada.
  2. ‡Department of Physics, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States.
  3. §Department of Mechanical Engineering, Vanderbilt University, Nashville, Tennessee 37240, United States.

PMID: 25879274 DOI: 10.1021/acs.nanolett.5b00494

Abstract

We have generated coherent pulses of terahertz radiation from macroscopic arrays of aligned single-wall carbon nanotubes (SWCNTs) excited by femtosecond optical pulses without externally applied bias. The generated terahertz radiation is polarized along the SWCNT alignment direction. We propose that top-bottom asymmetry in the SWCNT arrays produces a built-in electric field in semiconducting SWCNTs, which enables generation of polarized terahertz radiation by a transient photocurrent surge directed along the nanotube axis.

Keywords: SWCNTs; Single-wall carbon nanotubes; THz pulses; terahertz generation

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