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Anisotropic high-field terahertz response of free-standing carbon nanotubes Public Deposited

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https://ir.library.oregonstate.edu/concern/articles/8k71nn774

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  • We demonstrate that unidirectionally aligned, free-standing multi-walled carbon nanotubes (CNTs) exhibit highly anisotropic linear and nonlinear terahertz (THz) responses. For the polarization parallel to the CNT axis, strong THz pulses induce nonlinear absorption in the quasi-one-dimensional conducting media, while no nonlinear effect is observed in the perpendicular polarization configuration. Time-resolved measurements of transmitted THz pulses and a theoretical analysis of the data reveal that intense THz fields enhance permittivity in carbon nanotubes by generating charge carriers.
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  • Lee, B., Mousavian, A., Paul, M. J., Thompson, Z. J., Stickel, A. D., McCuen, D. R., ... & Lee, Y. S. (2016). Anisotropic high-field terahertz response of free-standing carbon nanotubes. Applied Physics Letters, 108(24), 241111. doi:10.1063/1.4954222
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  • 128
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  • 24
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  • The OSU work was supported by the National Science Foundation (DMR-1063632). The SNU work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (MSIP: NRF-2015R1A3A2031768).
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