Number of the records: 1
Dielectric properties of vertically aligned multi-walled carbon nanotubes in the terahertz and mid-infrared range
- 1.
SYSNO ASEP 0489481 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Dielectric properties of vertically aligned multi-walled carbon nanotubes in the terahertz and mid-infrared range Author(s) Thomson, M.D. (DE)
Zouaghi, W. (DE)
Meng, F. (DE)
Wiecha, M.M. (DE)
Rabia, K. (DE)
Heinlein, T. (DE)
Hussein, L. (DE)
Babu, D. (DE)
Yadav, S. (DE)
Engstler, J. (DE)
Schneider, J.J. (DE)
Nicoloso, N. (DE)
Rychetský, Ivan (FZU-D) RID, ORCID
Kužel, Petr (FZU-D) RID, ORCID, SAI
Roskos, H.G. (DE)Number of authors 15 Article number 034004 Source Title Journal of Physics D-Applied Physics. - : Institute of Physics Publishing - ISSN 0022-3727
Roč. 51, č. 3 (2018), s. 1-7Number of pages 7 s. Language eng - English Country GB - United Kingdom Keywords carbon nanotubes ; terahertz spectroscopy ; effective medium theory Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GA17-03662S GA ČR - Czech Science Foundation (CSF) Institutional support FZU-D - RVO:68378271 UT WOS 000418814600002 EID SCOPUS 85040311323 DOI 10.1088/1361-6463/aa9e42 Annotation We investigate the broadband dielectric properties of vertically aligned, multi-wall carbon nanotubes (VACNT), over both the terahertz (THz) and mid-infrared spectral ranges. A detailed comparison of various conductivity models and previously reported results is presented for the non-Drude behaviour we observe in the conventional THz range (up to 2.5 THz). Extension to the mid-infrared range reveals an absorption peak at 24 THz. To account for the observed resonance here, we apply a Bergman-type effective-medium theory including both the intra- and inter-tube response, which can reproduce the observed spectrum if one assumes a much higher plasma frequency and scattering rate than that reflected in the low-frequency spectra, and proposes an explanation for the non-Drude behaviour at low-frequencies.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2019
Number of the records: 1