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Issue 26, 2019, Issue in Progress
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Wavelength-dependent photoconductivity of single-walled carbon nanotube layers

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Abstract

A number of electronic devices such as phase shifters, polarizers, modulators, and power splitters are based on tunable materials. These materials often do not meet all the requirements namely low losses, fast response time, and technological compatibility. Novel nanomaterials, such as single-walled carbon nanotubes, are therefore widely studied to fill this technological gap. Here we show how the dielectric constant of single-walled carbon nanotube layers can be substantially modified by illuminating them due to unique light–matter interactions. We relate the optical excitation of the nanotube layers to the illumination wavelength and intensity, by resistance and capacitance measurements. The dielectric constant is modified under laser illumination due to the change of material polarization and free carrier generation, and is shown to not be temperature-related. The findings indicate that SWCNT layers are a prospective tunable optoelectronic material for both high and low frequency applications.

Graphical abstract: Wavelength-dependent photoconductivity of single-walled carbon nanotube layers

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Publication details

The article was received on 26 Feb 2019, accepted on 30 Apr 2019 and first published on 10 May 2019


Article type: Paper
DOI: 10.1039/C9RA01467E
RSC Adv., 2019,9, 14677-14682
  • Open access: Creative Commons BY-NC license
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    Wavelength-dependent photoconductivity of single-walled carbon nanotube layers

    S. Smirnov, I. V. Anoshkin, A. Generalov, D. V. Lioubtchenko and J. Oberhammer, RSC Adv., 2019, 9, 14677
    DOI: 10.1039/C9RA01467E

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