Effects of inclusion dimensions and p-type doping in the terahertz spectra of composite materials containing bundles of single-wall carbon nanotubes

Mikhail V. Shuba; Alesia Paddubskaya; Polina P. Kuzhir; Gregory Y. Slepyan; Dalius Seliuta; Irmantas Kašalynas; Gintaras Valušis; Akhlesh Lakhtakia

doi:10.1117/1.JNP.6.061707

5 October 2012 Effects of inclusion dimensions and p-type doping in the terahertz spectra of composite materials containing bundles of single-wall carbon nanotubes

Mikhail V. Shuba, Alesia Paddubskaya, Polina P. Kuzhir, Gregory Y. Slepyan, Dalius Seliuta, Irmantas Kašalynas, Gintaras Valušis, Akhlesh Lakhtakia

Author Affiliations +

Journal of Nanophotonics, Vol. 6, Issue 1, 061707 (October 2012). https://doi.org/10.1117/1.JNP.6.061707

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.

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Mikhail V. Shuba, Alesia Paddubskaya, Polina P. Kuzhir, Gregory Y. Slepyan, Dalius Seliuta, Irmantas Kašalynas, Gintaras Valušis, and Akhlesh Lakhtakia "Effects of inclusion dimensions and p-type doping in the terahertz spectra of composite materials containing bundles of single-wall carbon nanotubes," Journal of Nanophotonics 6(1), 061707 (5 October 2012). https://doi.org/10.1117/1.JNP.6.061707

Published: 5 October 2012

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