Author：Hongwei Wang, Yong Zhang, Yu He, Qingming Zhu, Lu Sun, Yikai Su
Abstract：Mode converters are key components in on-chip mode-division multiplexing systems. A compact silicon waveguide mode converter is proposed and demonstrated using all-dielectric metasurface structure with a tilted subwavelength periodic perturbation. The proposed waveguide mode converter can be scaled to realize arbitrary waveguide mode conversion. As examples, two waveguide mode converters are experimentally demonstrated on a silicon-on-insulator wafer, which can convert the TE0 mode to the TE1 mode and the TE2 mode with coupling lengths of 5.75 and 6.736 µm, respectively. The conversion losses of<1 db="" and="" crosstalk="" values="" of="">0-to-TE1 and the TE0-to-TE2 mode converters.
Publishing source：Advanced Optical Materials
