We propose and demonstrate a fabrication-friendly on-chip polarizer based on polarization-selective corner mirrors. The total internal reflection angles are distinct between TE and TM modes due to the strong birefringence of silicon-on-insulator (SOI) waveguide. Thus, by properly choosing the inclination angle, TE mode can be completely reflected at each corner mirror with negligible losses, whereas TM mode can be efficiently filtered out. The minimum feature size of such polarizer is as large as 400 nm. The measurement results show low excess losses of <; 1.2 dB and high extinction ratios of >20 dB over a 200-nm bandwidth. Such high performance can be maintained even with a large width deviation of > ±50 nm.

中文翻译：

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基于偏振选择角镜的易于制造的片上硅偏振器


我们提出并演示了一种基于偏振选择性角镜的易于制造的片上偏振器。由于绝缘体上硅 (SOI) 波导的强双折射，TE 模式和 TM 模式之间的全内反射角不同。因此，通过正确选择倾斜角度，TE模式可以在每个角镜处完全反射，损失可以忽略不计，而TM模式可以被有效滤除。这种偏光片的最小特征尺寸达400 nm。测量结果显示<的超额损耗较低；在 200 nm 带宽内具有 1.2 dB 和 >20 dB 的高消光比。即使在 > ±50 nm 的大宽度偏差下也能保持如此高性能。