TITLE

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

AUTHOR(S)
Seliuta, Dalius; Kašalynas, Irmantas; Macutkevic, Jan; Valušis, Gintaras; Shuba, Mikhail V.; Kuzhir, Polina P.; Slepyan, Gregory Ya.; Maksimenko, Sergey A.; Ksenevich, Vitaly K.; Samuilov, Vladimir; Qi Lu
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/16/2010, Vol. 97 Issue 7, p073116
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
52997917

 

Related Articles

  • Terahertz detection in single wall carbon nanotubes. Fu, K.; Zannoni, R.; Chan, C.; Adams, S. H.; Nicholson, J.; Polizzi, E.; Yngvesson, K. S. // Applied Physics Letters;1/21/2008, Vol. 92 Issue 3, p033105 

    It is reported that terahertz radiation from 0.69 to 2.54 THz has been sensitively detected in a device consisting of bundles of carbon nanotubes containing single wall metallic carbon nanotubes, quasioptically coupled through a lithographically fabricated antenna, and a silicon lens. The...

  • Electrical Properties and Scaling Behavior of MWCNT-Soda Lime Silica Glass. Shaaban, M.; Ali, A. // Journal of Electronic Materials;Jun2013, Vol. 42 Issue 6, p1047 

    Multiwall carbon nanotube (MWCNT)-soda lime silica glass composites were prepared by the direct mixing method. The dielectric properties of the composites were studied to explore the effect of MWCNT content on the conduction and relaxation mechanisms in such composites. A gradual increase in the...

  • Determination of the DC Electrical Conductivity of Multiwalled Carbon Nanotube Films and Graphene Layers from Noncontact Time-Domain Terahertz Measurements. Dadrasnia, E.; Lamela, H.; Kuppam, M. B.; Garet, F.; Coutaz, J.-L. // Advances in Condensed Matter Physics;2014, p1 

    Measuring the DC conductivity of very thin films could be rather difficult because of the electrical contact issue. This DC conductivity can, however, be extracted from non contact measurements at GHz and THz frequencies using elaborated conductivity models that nicely fit the experimental data....

  • Nanotube Fibers.  // Technology Review;Jan/Feb2010, Vol. 113 Issue 1, p85 

    The article reports on a study which explores the assembly of carbon nanotubes into long fibers to produce electrical conductivity.

  • Dielectric properties of single-walled carbon nanotubes in the terahertz frequency range. Nishimura, Hisaaki; Minami, Nobutsugu; Shimano, Ryo // Applied Physics Letters;7/2/2007, Vol. 91 Issue 1, p011108 

    The authors report on the terahertz time-domain spectroscopy of single-walled carbon nanotubes (SWCNTs) dispersed in a polymer film in a broad frequency range from 0.2 to 20 THz. The complex dielectric function of the composite film is obtained without using Kramers-Kronig analysis, from which...

  • Efficient terahertz generation by carbon nanotubes within the limited space-charge accumulation regime. Pennington, G.; Wickenden, A. E. // Journal of Applied Physics;May2009, Vol. 105 Issue 9, p094316 

    This paper investigates the generation of power at terahertz frequencies by a single-walled semiconducting carbon nanotube (s-SWCNT). The prediction of negative differential resistance (NDR) in s-SWCNTs allows for their consideration as a Gunn-type oscillator. Here we consider the regime of...

  • Diffusion mediated photoconduction in multiwalled carbon nanotube films. Sarker, Biddut K.; Arif, M.; Stokes, Paul; Khondaker, Saiful I. // Journal of Applied Physics;Oct2009, Vol. 106 Issue 7, p074307 

    We present a near infrared photoresponse study of large area multiwalled carbon nanotube (MWNT) films with different electrode separations. We show that the photocurrent strongly depends on the position of the laser spot with maximum response occurring at the metal-film interface. The time...

  • Terahertz spectroscopy of carbon nanotubes embedded in a deformable rubber. Rungsawang, R.; Geethamma, V. G.; Parrott, E. P. J.; Ritchie, D. A.; Terentjev, E. M. // Journal of Applied Physics;Jun2008, Vol. 103 Issue 12, p123503 

    The dielectric response and anisotropic properties of natural rubber with embedded multiwall carbon nanotubes (CNTs) are studied in the 0.2–3 THz frequency range using terahertz transmission spectroscopy. Natural rubber acts as an invisible and insulating medium in this frequency range,...

  • Room temperature terahertz electro-optic modulation by excitons in carbon nanotubes. Ogawa, T.; Watanabe, S.; Minami, N.; Shimano, R. // Applied Physics Letters;7/26/2010, Vol. 97 Issue 4, p041111 

    We have investigated the electroabsorption of aligned micelle-wrapped single-walled carbon nanotubes induced by intense terahertz (THz) pulses by using THz-pump and optical-probe spectroscopy at room temperature. The electroabsorption signal is enhanced at exciton resonances near the optical...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics