THz Surface Plasmons in Wide and Freestanding Graphene Nanoribbon Arrays

Graphene is a thin-film carbon material that has immense potential as key ingredient in new nanoelectronic and nanophotonic devices due to its unique characteristics. In particular, plasmons graphene appear practical tool for the manipulation of light with applications from cancer treatment solar cells. A motivating tunability properties been observed nanoribbons (GNRs) their geometrically controllable bandgaps that, turn, influence plasmonic properties. The formidable effort made over recent years developing GNR-based technologies is, however, weakened by lack predictive approaches draw upon available semi-analytical electromagnetic models. An example such framework used here, focusing on experimentally realized GNRs 155 480 nm wide organized two-dimensional (2D) GNR arrays. results show plasmon frequency behavior highly affected experimental setup or geometrical factors. bandgap analyzed systems order few meV density states opening around zero energy (Fermi level) contrast what graphene. From part, it all 2D arrays frequency–momentum trend follows q-like dispersion whose can be increased substantially increasing ribbon width charge concentration. Forbidden regions are high values excitation angle electron relaxation rate. sensing point view, important finding fact rate have responses similar those α−thrombin water. Our predictions projected fast support detecting more complex designs nanodevices molecular aqueous molecules.