Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3478009
Keywords
carbon nanotubes; coatings; glass fibres; nanofabrication; photoconductivity; silicon compounds; terahertz wave detectors
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Funding
- NATO [CB-P.EAP.CLG983910]
- ISTC [B-1708]
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Carbon nanotube layers prepared as coatings on silica fibers are found to be suitable for terahertz detection in 0.5-7.3 THz range within temperatures of 4.2-70 K. In time-domain of terahertz excitation, two following constituents in the photoresponse are discriminated: the first one is attributed to the bolometric effect while the other one is related to the photoconductivity caused by the terahertz-induced hopping effect. In frequency domain, nonmonotonic behavior of the photoconductivity is associated with prevailing carbon nanotube-induced antenna effects in the electronic transport. The experimental observations are supported by theoretical estimates. (C) 2010 American Institute of Physics. [doi:10.1063/1.3478009]
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