Research On Bragg Grating Structure Based Metallic Plasmonic Waveguide Devices

In the past few decades,integrated photon devices have become an effective means to solve the problem of communication capacity tension,and thus become the focus of research.Waveguides based on surface plasmon polaritons can not only greatly reduce the size of photonic components,but also achieve different functions by etching some special structural layouts in the waveguide,so it is an important way for the development of photonic integration.In this thesis,two kinds of metal plasmon waveguides based on grating structure are studied,and the band structure and transmission characteristics are studied through analysis.Finally,the functions of filter and harmonic are realized.The work of this thesis is divided into three parts.Firstly,discussion and analysis on the dispersion relation and the transmission characteristics of asymmetric and symmetric plasmon modes of the metal insulator metal waveguide Bragg grating.Then,based on the local field characteristics and lower loss characteristics of hybrid plasmonic waveguide,mode properties,band structure and transmission characteristics of TM and TE polarized modes in hybrid plasmonic waveguide Bragg grating structure are studied.Through the analysis based on the admittance matching principle,the transmission spectrum of hybrid plasmonic waveguide Bragg grating structure are optimized,and improvements on the transmission spectrum of the waveguide grating according to different frequency bands are realized.Finally,hybrid plasmonic waveguide Bragg grating designed combining micro-cavity structure and admittance matching layer is proposed,and the relationships between the performance of the micro-cavity and the cavity length,the number of periods are explored.Good theoretical basis and design method for optical resonator are proposed.In this thesis,two kinds of plasmonic waveguide Bragg grating are studied.Based on this,structures functioned as broadband or narrowband filter and mode filter are designed.The principle of admittance matching is considered here to optimize transmission spectrum of the waveguide Bragg grating in specific wavebands.The results provide references to design and analyze the related devices in optical communication,the integrated optical field,and have potential application value.