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. 2019 Mar 13;6(3):181605. doi: 10.1098/rsos.181605

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© 2019 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 6. — Characterization of crystalline films of arc-discharge SWCNTs of mixed electronic types. (a) Angular distribution of CNTs within a 1 cm² area of the film determined by SEM image analysis. (b) Polarization-dependent attenuation spectra in a wide spectral range, from the THz/far-infrared to the visible. (c) Expanded view of (b), showing interband transitions. (d) Time-domain THz waveforms of transmitted THz radiation for parallel and perpendicular polarizations. (e) Attenuation as a function of the angle between the THz polarization and the nanotube alignment direction. (f) Voltage–current relationship when the current flow is parallel and perpendicular to the CNT alignment direction. Adapted from [66].