In this paper, a wavelength demultiplexing structure based on multi-teeth-shaped metal-insulator-metal (MIM) plasmonic waveguide is designed and numerically studied using the finite-difference time-domain (FDTD) method. Investigating the characteristics of a multi-teeth-shaped plasmonic waveguide structure reveals that with the design of the structure, it was possible to create a mode inside the bandgap of the filter. Based on the created mode inside the bandgap of the filter, the demultiplexer structure has been proposed and investigated. By changing the geometric parameters of the structure, the transmission wavelength of the demultiplexer channel can be adjusted. The proposed demultiplexer can be used in integrated optical circuits.

中文翻译：

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基于多齿等离子波导管结构的波长解复用结构

本文设计了一种基于多齿金属-绝缘体-金属（MIM）等离子体波导管的波长解复用结构，并采用时域有限差分法（FDTD）进行了数值研究。研究多齿形等离子体波导结构的特性表明，通过结构的设计，可以在滤波器的带隙内创建模式。基于滤波器带隙内的创建模式，提出并研究了多路分解器结构。通过改变结构的几何参数，可以调节解复用器通道的传输波长。所提出的多路分解器可用于集成电路。