ABSTRACT We propose a planarized optical waveguide structure functionalized with 2D materials that exhibits strong polarization dependent light interaction. Numerical study on both TE – and TM-polarized lights propagation in the 2D material coated optical waveguide is carried out. The effective index, neff of optical waveguide increases with the increase of refractive index of the 2D material overlay but decreases when its extinction coefficient is increased. On the other hand, the effective extinction coefficient, keff of 2D material coated waveguide increases with the increase of both the real and imaginary parts of 2D material refractive index. It is found that TE-mode has a stronger interaction with 2D material overlay compared to TM-mode, giving rise to potential application like waveguide polarizer. By optimizing the coating thickness, TM-pass waveguide polarizer with high polarization extinction ratio of 78.5 and 97.7 dB can be produced using black phosphorus and graphene oxide, respectively, with a coating length of only 1 mm.

中文翻译：

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二维材料覆盖层功能化的平面光波导的大偏振响应

摘要 我们提出了一种二维材料功能化的平面光波导结构，该结构表现出强偏振相关的光相互作用。对 TE 和 TM 偏振光在二维材料涂层光波导中的传播进行了数值研究。光波导的有效折射率neff随着二维材料覆盖层折射率的增加而增加，但随着消光系数的增加而减小。另一方面，二维材料涂层波导的有效消光系数keff随着二维材料折射率实部和虚部的增加而增加。发现与 TM 模式相比，TE 模式与 2D 材料覆盖层的相互作用更强，从而产生了像波导偏振器这样的潜在应用。通过优化涂层厚度，