Subterahertz electromagnetic wave generation in a randomly networked single-walled carbon nanotubes photoconductive switch
- Subterahertz electromagnetic wave generation in a randomly networked single-walled carbon nanotubes photoconductive switch
- 신준환; 박정우; 한상필; 풀락; 송용원; 김남제; 류한철; 고현성; 박경현
- terahertz generation; carbon nanotube
- Issue Date
- Applied physics letters
- VOL 101, NO 26, 261119-1-261119-4
- We demonstrated an electromagnetic (EM) wave generation that reaches up to 250 GHz in the
photoconductive switch based on randomly networked single-walled carbon nanotubes
(SWNTs). Furthermore, we investigated the bias dependence of the electromagnetic wave
amplitudes. This subterahertz radiation is generated by the acceleration of photogenerated
carriers through fluctuation-induced tunneling in single-walled carbon nanotube bundles. Below
the bias field of 20 kV/cm, the signal was enhanced with an increase in the bias field. However,
the signal amplitudes decreased above 20 kV/cm due to emerging space-charge accumulation and
scattering effect occurring at the defects and contact points.
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- KIST Publication > Article
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