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- Kim, Dai-Sik
- Nano Optics Group
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Anisotropic high-field terahertz response of free-standing carbon nanotubes
- Author(s)
- Lee, Byounghwak, Mousavian, Ali, Paul, Michael J., Thompson, Zachary J., Stickel, Andrew D., McCuen, Dalton R., Jang, Eui Yun, Kim, Yong Hyup, Kyoung, Jisoo, Kim, Dai-Sik, Lee, Yun-Shik
- Issued Date
- 2016-06
- Citation
- APPLIED PHYSICS LETTERS, v.108, no.24, pp.241111
- Abstract
- 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.
- Publisher
- AMER INST PHYSICS
- ISSN
- 0003-6951
- Keyword
- GENERATION, RADIATION, POLARIZER
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