Applied Physics Letters · 2013 · 45 citations · 14 references
EngineeringElectrical EngineeringMaterials ScienceElectromagneticsMicrowave EngineeringThin FilmsCarbon NanomaterialsMicrowave Device SimulationMicrowave MaterialsShielding MaterialsThin Film Electrical PropertiesThin-film MaterialsElectromagnetic ShieldingElectromagnetic Shielding MaterialsMicrowave Absorbing MaterialsMicrowave AbsorptionRectangular WaveguidesShielding In Thin FilmsSkin DepthThin-film Electromagnetic Modeling
Electromagnetic properties of pyrolytic carbon (PyC) films with thickness from 5 to 241 nm are studied experimentally and numerically at 28 GHz. We observe experimentally that PyC films are capable to absorb up to 50% of microwave power in the Ka-band. By using boundary conditions in the rectangular waveguide, we demonstrate theoretically that 50% of microwave power can be absorbed in a conductive film with thickness much smaller than the skin depth. The results of modelling for PyC films on silica substrate are in excellent coincidence with the experimental data.
14