"双Loop-Stub侧边耦合波导结构多重等离激元诱导透明效应的数值分析"

The research paper titled "Numerical Analysis of Multiple Electromagnetically-Induced Transparency Effects in Double Loop-Stub Side-Coupled Waveguide Structures" explores the phenomenon of electromagnetically-induced transparency (EIT) in double loop-stub (LS) resonator side-coupled waveguide structures. Using finite element methods, the optical transmission properties of three different structures - ipsilateral, opposite-side, and antisymmetric double LS resonators - are numerically simulated. The results show that the transmission spectra, magnetic field distribution, and dispersion of these structures strongly depend on the structural parameters. The study particularly focuses on the impact of the distance between the adjacent stub resonators or horizontal branches of the double LS resonators on the transmission properties. As the distance decreases, the coupling between the two LS resonators increases, leading to the appearance of multiple transmission peaks and valleys (i.e., stop bands) and significant multiple EIT-like effects. Additionally, the influence of parameters such as the width of vertical and horizontal branches and the total length of the horizontal branches on the transmission spectra is discussed when the distance between the adjacent stub resonators of the same-side double LS resonators is zero. The side-coupled metal nanowaveguide structures discussed in the research paper hold potential applications in integrated optics in the future, such as filters, sensors, and slow light devices. In conclusion, the study provides valuable insights into the multiple EIT-like effects in double loop-stub side-coupled waveguide structures and their potential practical applications in advanced optical devices.