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We demonstrate enhanced terahertz wave transmission through carbon nanotube films with subwavelength apertures. The peak frequency of the transmitted waves matches well with the shape resonance, mainly determined by the length of the apertures and the refractive index of surrounding media.
Absorption spectra of high purity metallic and semiconducting single-walled carbon nanotubes have been measured from THz to UV region. The broad absorption band around 100-1000 cm-1 of the metallic sample can correspond to the optical transition between small energy gap in “metallic” nanotubes.
In this paper, a novel transparent thin film based on carbon nanotube (CNT) technology for radio frequency (RF) electromagnetic shielding is presented. The thin film, which is assumed to be infinite in length and width and tens to hundreds nanometers in thickness, consists of two layers of CNTs perpendicular to each other with a distance of hundreds of nanometers and a host medium which encloses the...
Absorption spectra of high purity metallic and semiconducting single-walled carbon nanotubes separated by density-gradient ultracentrifugation method have been measured using THz time-domain spectroscopy. Absorbance in metallic nanotubes increase with increasing frequency up to 6 THz. This result suggests that the dielectronic properties even for high purity metallic nanotube samples can not be explained...
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