Based on Fabry model and finite-different time-domain(FDTD) method, the plasmonic structure composed of a metal-insulator-metal(MIM) bus waveguide and a side-coupled resonator was investigated. It is found that the tr...Based on Fabry model and finite-different time-domain(FDTD) method, the plasmonic structure composed of a metal-insulator-metal(MIM) bus waveguide and a side-coupled resonator was investigated. It is found that the transmission features can be regulated by the cavity width and coupling distance. Electromagnetically induced transparency(EIT)-like transmission can be excited by adding an identical resonator on the pre-existing structure. Combining the foregoing theoretical analysis with coupled mode theory(CMT), the formation process of the EIT-like transmission was detailedly analyzed. EIT-like transmission can also be excited in plasmonic structure with two detuned resonators. By altering the structure parameters, the transparency window can be purposefully modulated. With the merits of compact structure and simplicity in fabrication, the proposed structures may have a broad prospect of applications in highly integrated optical circuits.展开更多
GIS设备在中国电网建设中占据着重要位置,设备的安全运行至关重要。在高压设备发生短路故障时,通过设备导体与壳体的短路电流峰值高达171 k A,这对设备的动稳定性和热稳定性都提出了苛刻的要求。针对接地回路,热稳定性考核通过理论计算...GIS设备在中国电网建设中占据着重要位置,设备的安全运行至关重要。在高压设备发生短路故障时,通过设备导体与壳体的短路电流峰值高达171 k A,这对设备的动稳定性和热稳定性都提出了苛刻的要求。针对接地回路,热稳定性考核通过理论计算即可满足要求,但对于动稳定性分析,由于空间结构复杂,理论计算较为困难。文中以小型化550 kV GIS用接地开关的接地回路为研究对象,基于Ansys 16.1的电磁场与结构场进行耦合分析,由电磁场得出接地回路的电流密度与磁通密度分布,给出各部位电动力密度云图,再导入结构场,对接地回路导流排的受力进行强度校核,最终完成导流排结构的优化。通过研究,对比不同结构的仿真结果,分析结构差异,提出了优化设计方案,为高压GIS接地回路的结构改进设计提供了理论基础。展开更多
基金Project(61275174)supported by the National Natural Science Foundations of ChinaProject(20100162110068)supported by the Doctoral Program of Higher Education of China
文摘Based on Fabry model and finite-different time-domain(FDTD) method, the plasmonic structure composed of a metal-insulator-metal(MIM) bus waveguide and a side-coupled resonator was investigated. It is found that the transmission features can be regulated by the cavity width and coupling distance. Electromagnetically induced transparency(EIT)-like transmission can be excited by adding an identical resonator on the pre-existing structure. Combining the foregoing theoretical analysis with coupled mode theory(CMT), the formation process of the EIT-like transmission was detailedly analyzed. EIT-like transmission can also be excited in plasmonic structure with two detuned resonators. By altering the structure parameters, the transparency window can be purposefully modulated. With the merits of compact structure and simplicity in fabrication, the proposed structures may have a broad prospect of applications in highly integrated optical circuits.
