A Research Of Optical Properties Of Metallic Nano-Structure Based On Surface Plasmon Polaritions Effect

The optical property of the surface plasmon-polaritons(SPP) has invoked a great deal of interest for many researchers because of their importance in physics and potential applications to engineering. SPP modes are surface waves confined at a metal-dielectric interface originating from the resonant excitation of the free electrons in the metal. Extraordinary transmission of light through nanoholes, including single apertures and aperture arrays, has attracted considerable attention and has been widely investigated in recent years. SPP play an essential role in this phenomenon. Sub-wavelength-sized metal particles can exhibit optical resonances associated with resonant collective electron oscillations known as localized surface plasmons(LSP). Excitation of LSPs results in the occurrence of pronounced extinction bands. many experimental investigations and theoretical calculations have shown that the characteristics of the resonance such as central frequency, bandwidth, amplitude and line shape depend on the particle size, shape, surrounding media, lattice constant, as well as the arrangement of the particle periodic arrays.This paper mainly includes two aspects content. The first part is the transmission spectrum characteristics of metal photonic crystals, The second part is extinction spectrum characteristics of metal nanoparticles array. Full text is divided into seven chapters.The first chapter is introduction. This chapter briefly introduced the research background of this paper and research contents and innovations of this paper. It mainly includes surface plasma research progress and its application, and this research content of surface plasmon.The second chapter is mainly about the basic principle and properties of surface plasmon, and the numerical simulation method of the metal microstructure also be introduced at the same time. The basic principle of numerical simulation method time-domain finite check method (FDTD) which is used in this paper is introduced detail.The third chapter describes stimulate methods and conditions of plasma wave, and study metal photonic crystal extraordinary optical transmission use FDTD numerical simulation method, researched the hole and thickness of cycle, the medium in the hole and substrate medium influence on transmission rate for the whole structure is presented, and then explain by theory.The fourth chapter is using FDTD numerical simulation design gold nanoparticles are arranged in quartz glass structure covered with dielectric substrate film, researched characteristics of substrate and topological shape of gold nanoparticles influence on the extinction, and then analysis the simulation results by the guided wave mode theory and wave coupling principle.The fifth chapter is the conclusion and prospect. This chapter summarizes the whole thesis content, and puts forward some Suggestions of improvement and the mechanism of further research is needed.