Abstract Mode-division multiplexing (MDM) in silicon-on-insulator platform is an emerging technology to increase the channel number of a single wavelength carrier by the number of modes and consequently increase the transmission capacity of on-chip optical interconnects. We propose and theoretically demonstrate a multimode branching structure based on the truncated Eaton lens. The proposed T-junctions efficiently convert the higher-order modes into fundamental modes; therefore, they can be potentially employed to manipulate modes in MDM systems. The designed T-junctions are implemented by varying the guiding layer’s thickness on a silicon-on-insulator platform. The three-dimensional simulations verify that the proposed structures can split the TE2 (TE1) mode into the fundamental modes with an average transmitted power of 32% (47%) in a 1550–1600 nm bandwidth.

中文翻译：

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基于截断伊顿透镜的多模 T 形接头

摘要 绝缘体上硅平台中的模分复用（MDM）是一种新兴技术，可以通过模式数量增加单个波长载波的通道数量，从而增加片上光互连的传输容量。我们提出并在理论上证明了基于截断伊顿透镜的多模分支结构。所提出的 T 结有效地将高阶模式转换为基本模式；因此，它们可以潜在地用于操纵 MDM 系统中的模式。设计的 T 型结是通过改变绝缘体上硅平台上的引导层厚度来实现的。