Abstract
The excellent transmission characteristics of graphene surface plasmon polaritons in mid-infrared band were analyzed and verified effectively through theoretical derivation and soft simulation in this paper. Meanwhile, a sandwich waveguide structure of dielectric–graphene–substrate–dielectric based on graphene surface plasmon polaritons (SPPs) was presented. Simulation results indicate that graphene SPPs show unique properties in the mid-infrared region including ultra-compact mode confinement and dynamic tunability, which allow these SPPs to overcome the defects of metal SPPs and traditional silicon-based optoelectronic devices. Thus, they can be used to manufacture subwavelength devices. The work in this paper lays a theoretical foundation for the application of graphene SPPs in the mid-infrared region.
Highlights
The development of the optoelectronics industry brought about by new emerging technologies including silicon photonics, photonic crystals, and surface plasmon polaritons (SPPs) has enabled optoelectronic devices to become more miniaturized, integrated, and multi-functional [1].The miniaturization of optoelectronic devices is key to promoting the development of optoelectronic devices for very large-scale integration
This is mainly due to the increasing electrical conductivity of graphene caused by the changing voltage applied to graphene
Si is selected as the graphene substrate and dielectric material, andHere, the substrate is 10 material is Si, and v = 1 V.3,Figure reveals thatof and length of graphene SPPs (Lg) increases with the increasing nm
Summary
The development of the optoelectronics industry brought about by new emerging technologies including silicon photonics, photonic crystals, and surface plasmon polaritons (SPPs) has enabled optoelectronic devices to become more miniaturized, integrated, and multi-functional [1].The miniaturization of optoelectronic devices is key to promoting the development of optoelectronic devices for very large-scale integration. Surface plasmon polaritons (SPPs) excited by resonance between incident photon and free electron gas on a metal surface are widely used for light manipulation at the subwavelength scale [4,5,6,7] Due to their ability to break the fundamental diffraction limit and their ultra-compact mode confinement, SPPs have can be used to fabricate micro–nano optoelectronic devices, which is beneficial to realizing the miniaturization of optoelectronic integrated devices. Plasmon resonances in metals suffer high decoherence, which limits their applicability to optical processing devices In this context, it is urgent to search for better surface plasma materials to ensure a stronger constraint ability and smaller loss
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