Electromagnetic Properties of Graphene-like Films in Ka-Band

Applied Sciences

Sofia Voronovich¹  Alesya Paddubskaya¹  Konstantin Batrakov¹  Polina Kuzhir¹  Sergey Maksimenko¹  Tommi Kaplas² 

[1] Research Institute for Nuclear Problems of Belarusian State University, Bobruiskaya str., 11, Minsk 220030, Belarus; E-Mails:;Institute of Photonics, University of Eastern Finland, P.O. Box 111, Joensuu FI-80101, Finland; E-Mail:

关键词: microwave frequency range;    reflectance;    transmittance;    absorbance;    thin films;    pyrolytic carbon;    numerical simulation;    rectangular waveguide;   

DOI  :  10.3390/app4020255

来源: mdpi

【 摘 要 】

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 K_a-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 K_a-band.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.