Plasmonic Nature of the Terahertz Conductivity Peak in Single-Wall Carbon Nanotubes

Abstract

Plasmon resonance is expected to occur in metallic and doped semiconducting carbon nanotubes in the terahertz frequency range, but its convincing identification has so far been elusive. The origin of the terahertz conductivity peak commonly observed for carbon nanotube ensembles remains controversial. Here we present results of optical, terahertz, and DC transport measurements on highly enriched metallic and semiconducting nanotube films. A broad and strong terahertz conductivity peak appears in both types of films, whose behaviors are consistent with the plasmon resonance explanation, firmly ruling out other alternative explanations such as absorption due to curvature-induced gaps.

8 pages, 4 figure

References in corpus (5)

• Fundamental Optical Processes in Armchair Carbon Nanotubes
• Thermal Radiation From Carbon Nanotube in Terahertz Range
• Collective Antenna Effects in the Terahertz and Infrared Response of Highly Aligned Carbon Nanotube Arrays
• Terahertz Dynamics of Quantum-Confined Electrons in Carbon Nanomaterials
• Terahertz emitters and detectors based on carbon nanotubes

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• Macroscopically Self-Aligned and Chiralized Carbon Nanotubes: From Filtration to Innovation
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