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Appl. Sci. 2014, 4(2), 255-264;

Electromagnetic Properties of Graphene-like Films in Ka-Band

Research Institute for Nuclear Problems of Belarusian State University, Bobruiskaya str., 11, Minsk 220030, Belarus
National Research Tomsk State University, 36, Lenina Avenue, Tomsk 634050, Russia
Institute of Photonics, University of Eastern Finland, P.O. Box 111, Joensuu FI-80101, Finland
Author to whom correspondence should be addressed.
Received: 25 February 2014 / Revised: 25 April 2014 / Accepted: 29 April 2014 / Published: 15 May 2014
(This article belongs to the Special Issue Towards Applications of Graphene)
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We studied electromagnetic properties of pyrolytic carbon (PyC) films with thicknesses from 9 nm to 110 nm. The PyC films consisted of randomly oriented and intertwined graphene flakes with a typical size of a few nanometers were synthesized by chemical vapor deposition (CVD) at 1100 °C on a quartz substrate. The reflectance and transmittance of these films in Ka-band, 26–37 GHz, were studied both experimentally and theoretically. The discovered remarkably high absorption loss of up to 50% of incident power, along with chemical stability, makes PyC films attractive for electromagnetic (EM) interference shielding in space and airspace communication systems, as well as in portable electronic devices occupying this frequency slot. Since, in practical applications, the PyC film should be employed for coating of dielectric surfaces, two important issues to be addressed are: (i) which side (front or back) of the substrate should be covered to ensure maximum absorption losses; and (ii) the frequency dependence of absorbance/transmittance/reflectance of binary PyC/quartz structures in the Ka-band. View Full-Text
Keywords: microwave frequency range; reflectance; transmittance; absorbance; thin films; pyrolytic carbon; numerical simulation; rectangular waveguide microwave frequency range; reflectance; transmittance; absorbance; thin films; pyrolytic carbon; numerical simulation; rectangular waveguide

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Voronovich, S.; Paddubskaya, A.; Batrakov, K.; Kuzhir, P.; Maksimenko, S.; Kaplas, T.; Svirko, Y. Electromagnetic Properties of Graphene-like Films in Ka-Band. Appl. Sci. 2014, 4, 255-264.

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