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Journal of Nanophotonics

Effects of inclusion dimensions and p-type doping in the terahertz spectra of composite materials containing bundles of single-wall carbon nanotubes
Author(s): Mikhail V. Shuba; Alesia Paddubskaya; Polina P. Kuzhir; Gregory Y. Slepyan; Dalius Seliuta; Irmantas Kašalynas; Gintaras Valušis; Akhlesh Lakhtakia
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Paper Abstract

Experiments recently showed that the finite lengths of single-wall carbon nanotubes (SWNTs) randomly dispersed and randomly aligned in a composite material are responsible for the appearance of a broad peak in its terahertz conductivity. We investigated, both theoretically and experimentally, the influences of the cross-sectional diameter and the acid-induced p-type doping of SWNT bundles in composite materials on their terahertz conductivity peaks (TCPs). We found that the TCP blue-shifts if the inclusion diameter is larger, and that doping enhances the effective conductivity of the composite material. But, a theoretical prediction of the blue-shifting of the TCP by p-type doping was only weakly supported by experimental evidence. All experimental observations turned out to be in good qualitative agreement with the concept of localized plasmon resonance in SWNTs.

Paper Details

Date Published: 5 October 2012
PDF: 10 pages
J. Nanophoton. 6(1) 061707 doi: 10.1117/1.JNP.6.061707
Published in: Journal of Nanophotonics Volume 6, Issue 1
Show Author Affiliations
Mikhail V. Shuba, Belarusian State Univ. (Belarus)
Alesia Paddubskaya, Belarusian State Univ. (Belarus)
Polina P. Kuzhir, Belarusian State Univ. (Belarus)
Gregory Y. Slepyan, Belarusian State Univ. (Belarus)
Dalius Seliuta, Ctr. for Physical Sciences and Technology (Lithuania)
Irmantas Kašalynas, Ctr. for Physical Sciences and Technology (Lithuania)
Gintaras Valušis, Ctr. for Physical Sciences and Technology (Lithuania)
Akhlesh Lakhtakia, The Pennsylvania State Univ. (United States)

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