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Terahertz sensing with carbon nanotube layers coated on silica fibers: Carrier transport versus nanoantenna effects

Source: Appl. Phys. Lett. 97, 073116 (2010); doi:10.1063/1.3478009

Published 19 August 2010

KEYWORDS and PACS
Keywords
PACS
  • 81.07.De
    Nanotubes: fabrication and characterization
  • 72.40.+w
    Photoconduction and photovoltaic effects
  • 07.57.Pt
    Submillimeter wave, microwave and radiowave spectrometers
  • 73.63.Fg
    Nanotubes (electronic transport)
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9644 (online)
Publisher:
AIP is a member of CrossRef AIP
Dalius Seliuta,1,2 Irmantas Kašalynas,1 Jan Macutkevic,1 Gintaras Valušis,1 Mikhail V. Shuba,3 Polina P. Kuzhir,3 Gregory Ya. Slepyan,3 Sergey A. Maksimenko,3 Vitaly K. Ksenevich,4 Vladimir Samuilov,5 and Qi Lu5
1Centre for Physical Sciences and Technology, Semiconductor Physics Institute, Goštauto 11, LT-01108 Vilnius, Lithuania
2Department of Electronic Systems, Vilnius Gediminas Technical University, Naugarduko 41, LT-03227 Vilnius, Lithuania
3Institute for Nuclear Problem, Bobruiskaia 11, Minsk 220030, Belarus
4Department of Physics, Belarus State University, Nezalezhnastsi Avenue 4, 220030 Minsk, Belarus
5Department of Physics, St. John's University, Queens, New York 11439, USA
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. ©2010 American Institute of Physics
History: Received 2 June 2010; accepted 2 July 2010; published 19 August 2010
Permalink: http://link.aip.org/link/?APPLAB/97/073116/1

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