Research On The Nanostructures Of The Surface Plasmon Polaritons Based On The Metal-insulator-metal Wavegudie

Surface Plasmon Polaritons(SPPs) are electromagnetic excitations propagating along the metal-dielectric interface by the interaction of free electron in metallic surface with environmental photons. SPPs nanoscale devices, confined the light wave at metal surface, have been considered as the key to surpassing the diffraction limit of conventional optics and realized the design of optical devices in the subwavelength scale. With the research development on the physical characteristics, SPPs nanoscale devices have recently been attracting increasing attention in the photonic devices, optical sensing and other areas of photonics.In this dissertation, based on the symmetrical metal-cladding optical waveguide, the transmission characteristics of SPPs have been investigated in the nanoscale optical devices by the transfer matrix method, and the analysis results have been demonstrated by the Finite Difference Time Domain Method. The main research works and conclusions in this dissertation are as following:(1) A metal-cladding waveguide with periodic corrugations based on the symmetrical metal-cladding optical waveguide is proposed. The transmission characteristics of SPPs have been researched by the transfer matrix method in the metal-cladding waveguide with periodic corrugations. The analysis results show that a SPPs band gap exists in the metal-cladding periodic corrugations waveguide with special structure parameters. The FDTD has been used to calculate the metal-cladding waveguide with periodic corrugations and simulate the electromagnetic field distribution and spectrum characteristics of SPPs.(2) A SPPs wavelength splitter based on metal-cladding waveguide with periodic corrugations is proposed. The SPPs with different incident wavelength could be split by setting the structure parameters in the metal-cladding periodic corrugations waveguide. Using the FDTD, the SPPs wavelength splitters with different structure parameters have been simulated, in which the propagation characteristics and electromagnetic field distribution of SPPs are demonstrated. In the simulations, the extinction ratios are 30.5dB and-29.2dB, corresponding to the SPPs wavelength splitter with operating wavelengths of 756 nm and 892 nm. The SPPs wavelength splitter with different operating wavelengths could be designed by adjusting the structure parameters in the metal-cladding periodic corrugations waveguide.(3) A SPPs comb-like filter based on the symmetrical metal-cladding optical waveguide is proposed. The transmission characteristics of SPPs have been researched in the SPPs comb-like filter by the interference theory. The SPPs comb-like filters have been simulated with different structure parameters by the optical simulation software FDTD Solutions, in which the spectrum characteristics and electromagnetic field distribution of SPPs are researched. The spectrum characteristics could be modulated by adjusting the structure parameters of the SPPs comb-like filter.(4) A method has been proposed to determine the components of the second hyperpolarizability of a conjugated polymer in the off-resonant region based on the attenuated-total-reflection technique. An electro-optic polymer waveguide modulator based on both Pockels and Kerr effects has been demonstrated, and the modulation depth of the sample is improved with the DC bias at fixed modulation voltage.