| With the further research on the surface light field characteristics of complex periodic structures,the properties of periodic membrane systems in surface plasmons have attracted extensive attention.Based on the designing of different micro-nano periodic structures,the characteristics of surface light field characteristics and the composite/difference scattering in films containing defects were studied.Our research was far-reaching significance for nondestructive testing of target,the design and adjustment of micro-nano periodic membrane system.In this paper,the surface light field properties of optical films with various periodic structures was investigated.The special periodic structures designed in this paper,includes hemispherical periodic structure,stomatal square periodic structure,crescent periodic structure,circular ring,double circular ring,and other complex heteromorphic structures.Through the simulation experiments,the composite/difference scattering fields on the surface of each periodic structure were calculated by simulation experiments,In addition,the effects of plasmons on the surface of metal nanoscale periodic structures and the surface light fields of other complex metal periodic structures such as rings were considered as well.The innovation points and research results of this paper were described as follows:1.Based on the Maxwell differential equation in three-dimensional(3-D)space,combining the basic theory of Daubechies wavelet function and the Finite Difference Time Domain(FDTD)method,the iterative calculation formula of multi-resolution Finite Difference Time Domain(MRTD)method in 3-D space was derived.The details of the special edge and angle structures in the overlapping region were approximated,The formulas of connection boundary,absorption boundary,and near or far field extrapolation in the MRTD method were derived.According to these theories,a 3-D surface composite scattering model of periodic structure was established.The characteristics of dispersion relation between the MRTD method and the FDTD method were compared and analyzed,and the high efficiency and accuracy of MRTD method can be verified.2.Based on the design and tuning of micro and nano periodic structure films,the optical glass film system with hemispherical periodic distribution was designed.The light field distribution on the surface of 3-D micro and nano periodic structure was analyzed.The differential scattering cross section of the periodic structure was considered.By controlling the parameters,such as filling material,hemispheric size and hemispheric spacing,the influence of different parameters on the composite scattering field of optical periodic structure surface were extracted;and the periodic structure surface were presented.3.In order to solve the problem of nondestructive detection of defect targets in micro and nano optics,a new 3-D model of the porous square hole periodic structure surface and metal particles was designed in this paper.The composite scattering field characteristics of the porous square hole periodic medium optical surface and single/double Cu defect particles were calculated.Based on the 3-D half-space difference field theory,the composite/difference field scattering of buried particle-clusters on the surface of micro/nano rough optical thin films was described in detail.The influence of different material parameters,such as roughness,incident angle,particle spacing,buried depth,number and size of cluster particles on the results were analyzed and compared.4.According to the properties of plasmon generated by light scattering in metal micro-nano periodic structures,a 3-D calculation model of Drude dispersion medium the MRTD method was used to establish a gold film with anomalous periodic structure distribution.The anomalous periodic structure includes complex periodic structure units such as crescentshaped,ring-through-hole.The influence of structure parameters and polarization angle on the surface light field characteristics was emphatically investigated. |
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