Wang Jiang, Shen Zhongxiang, Gao Xiang, Wu Wen
Opt Lett. 2016 Jan 15;41(2):424-7. doi: 10.1364/OL.41.000424.
We herein report a linear polarizer based on a 2D array of substrate integrated waveguide cavities, which can convert an arbitrary linearly polarized (LP) incident wave into an outgoing LP wave in a specified polarization direction with constant transmittance. Two orthogonal slots etched on the front surface of the cavity are utilized to couple a wave of arbitrary polarization into the cavity, while another slot on the back side helps to couple the field out along a desired polarization direction. Microwave experiments are performed as a proof of concept. The proposed polarizer exhibits very good performance with stable transmittance as 50% and a polarization extinction ratio over 45 dB. The new polarizer is potentially useful in novel polarization-selective devices that are immune to the polarization direction of an incident plane wave.
我们在此报告一种基于衬底集成波导腔二维阵列的线性偏振器，它可以将任意线偏振（LP）入射波转换为具有恒定透射率的特定偏振方向的出射LP波。蚀刻在腔体前表面的两个正交狭缝用于将任意偏振的波耦合到腔体内，而背面的另一个狭缝有助于沿所需偏振方向将场耦合出去。进行了微波实验作为概念验证。所提出的偏振器表现出非常好的性能，透射率稳定在50%，偏振消光比超过45 dB。这种新型偏振器在对入射平面波的偏振方向不敏感的新型偏振选择器件中可能很有用。
