The Study Of Interaction Between Surface Plasmon Polaritons Cavity And Two-Dimensional Material

In recent years,the miniaturization and integration of optical devices based on metal micro-nano structure has become an important research focus in the field of physical optics due to the subwavelength characteristic of surface plasmon polaritons.Fano resonance can be generated in a specific cavity by using surface plasmon polaritons.The Fano resonance spectrum line is extremely narrow,the distance between peak and valley is short,and the sensitivity is extremely high.Therefore,it is mostly used in the application of sensors and detector directions.In these specific cavities,the metal-insulator-metal(MIM)waveguide structure stands out because it is easy to construct and saves space.Many functions can be realized by using the MIM structure,including the implementation of the filter discussed in this paper.Two-dimensional materials,especially Transition Metal Dichalcogenides(TMDs),have shown a good prospect in the field of nano-optics due to their good optoelectronic properties,and have become a hot research topic in recent years.The single layer TMDs material has a direct band gap and its excitons have a large binding energy.However,the Surface Plasmon of metal nanostructures have sub-wavelength optical local characteristics.Through scientific design,the metal nanostructure cavities can be combined with TMDs materials,so that the two can interact with each other and even reach the degree of strong coupling.This will play a great role in promoting the future development of nano-electro-optical research.Based on this background,the specific research contents of this paper are as follows:In this paper,the generation of Fano resonance in a single tooth-shaped waveguide filter is studied theoretically and simulatively.Theoretically,based on the scattering matrix theory and the coupling mode theory,the scattering matrix of the transmission system is given and the transmittance can be calculated.In the simulation,through specific adjustment of the basic MIM structure,multiple Fano resonances are generated and interactions are generated to achieve the band-resistance waveform.Further adjust the parameters in the structure,so that the waveform of the filter changes to adapt to different needs.The filter parameters can be adjusted by center wavelength,band resistance width,band resistance performance,etc.The experimental simulation and theoretical analysis of the interaction between WS2,which is a representative part of TMDs material,and metal nanostructures are carried out.Rabi splitting phenomenon is generated by strong coupling through adjusting the spacing of technological nanostructures and structural parameters.This has important implications for the study of spontaneous radiation,forster energy transfer,quantum entanglement,Bose-Einstein condensation and other physical phenomena and processes.