Numerical Research On Photon Localization Enhancement In YBCO Superconducting Network Materials

Superconducting photonic crystal structures have garnered increasing attention in recent years due to their characteristics of low scattering,low loss,and strong anti-interference properties below the critical temperature,and have been widely researched in areas such as optical communication,sensing,detection,and quantum computing.Among these studies,research on photon localization enhancement based on superconducting photonic crystals has become one of the hot topics in domestic and international research.In order to conduct a comprehensive and sufficient study on photon localization enhancement,this paper is based on the geometric design of yttrium barium copper oxide high-temperature superconducting photonic crystals,and carries out calculations and simulations on the photon energy band,energy band modulation,and localized enhancement induced by defects.The main research content of this paper is as follows:(1)Construction of superconducting photonic crystal unit cell structure model and calculation of energy band distribution.This paper mainly introduces the design of various structures by investigating the basic structure model of superconducting photonic crystals.The crystal pillars include circular crystal pillars,square crystal pillars and rectangular crystal pillars,and the lattice structures include square lattice structures and triangular lattice structures.Different crystal columns and lattice structures are arranged and combined into a unit cell structure,and the physical parameters of superconducting photonic crystals are determined by optimizing the dimensions and filling factor of each structure.The band structure distribution of the superconducting photonic crystal unit cell structure in the superconducting state and quenching state is calculated using the Maxwell equations,the two-fluid model and the Drude model.(2)Calculation and analysis of the influence of different physical parameters on the bandgap width of superconducting photonic crystals:by using the wave optics and the two-fluid model,we investigated the variation of the bandgap width of superconducting photonic crystal structures under different conditions,including different temperatures,lattice sizes,superconducting column sizes,and shapes.We analyzed the variation trend of the bandgap width under different conditions,and screened out the model structures suitable for further research.(3)Calculation and analysis of the transmission spectrum and photon localization enhancement of superconducting photonic crystals.A model structure with good performance was selected for the study of transmittance spectrum and localized enhancement based on previous research.We simulated the material’s frequency domain and calculated the transmittance spectra of superconducting photonic crystals for different lattice structures,temperatures,and incident angles,clarifying the trend of the transmission spectrum under various conditions and comparing the zero-transmission regions of different lattice structures.We set defects in the structure of the superconducting photonic crystal and calculated the light field distribution to analyze the trend of the effect of defect structure size on photon localization enhancement.