Research Information System
Mühendislik Bilimleri ve Tasarım Dergisi, vol.8, no.4, pp.1269-1277, 2020 (Peer-Reviewed Journal)
Graphene-tunable, particle-based and absorber metamaterials are presented whichutilize titanium nitride as the plasmonic material. The design of the particle-basednanoantenna array is shown via geometrical parameter sweep simulations.Additionally, the origin of the resonance mode is revealed by decomposing thespectrum into the radiating contributions of multipoles and near-fieldenhancement distribution maps. Moreover, the tunability of the designedmetamaterial is shown by changing the chemical potential of a monolayer ofgraphene which is coated on top of the device. To utilize the designed device as anabsorber metamaterial, a mirror layer is introduced for the elimination of thetransmission through the device. With the aim of obtaining perfect absorption, thethickness values of the functional layers are optimized via parameter sweepsimulations. Finally, the tunability of the absorber metamaterial is shown byutilizing a graphene monolayer on top of the nanoantennas and the tuningperformance of both architectures are compared. The engineering of graphenetunable metal-free metamaterials provides a novel strategy for the development oflow-cost integrated photonic devices and plasmonic devices which are resistant tohigh temperatures.