Enhanced polarization tuning in hybrid-active-U-shaped nanostructure with dependence of 2D graphene layer using COMSOL Software

Abstract

In current era, graphene material contributes to the enhancement of polarization active-tuning and offers new procedure to function and restrict light on the nano-level scaled. we designed and systematically studied the surface plasmon resonance (SPR) characteristics of graphene layer on the inside of noble metal nano-U-shaped structure. It is found that the plasmon resonance of noble metal U-shaped nanostructure can be effectively tuned by adjusting the graphene Fermi energy from 0.2 eV to 1.2 eV. By optimizing the structural parameters of the U-shaped and introducing graphene different layers, the local field in the U-shaped model can be greatly enhanced. For realizing the strength of carrier density in graphene, Fermi energies also applied from to two portions from left and right in the nano-U-shaped structure with a specific  graphene thickness of ~0.335 nm to ~2.68 nm . This type of hybrid plasmonics in graphene shows very prominent features for enhanced polarization hybrid-active tuning.