Asymmetric transmission of light has important applications in integrated photonic systems for communications and information processing. Various Lorentz-reciprocal devices have been explored to achieve asymmetric transmission. However, the contrast ratio is limited. Here we show that the asymmetric transmission of linearly polarized and circularly polarized waves can both be achieved by combining polarization conversion and selective transmission. What is perhaps most important here is that the proposed asymmetric transmission devices for operation at wavelength 633 nm experimentally display asymmetric transmission with contrast ratio exceeding 37 dB and 34 dB for linearly polarized wave and circularly polarized wave, respectively. The high contrast ratios are much higher than previous results in published literature. The proposed reciprocal approach holds promising for utilization in integrated photonic systems.

光的非对称传输在用于通信和信息处理的集成光子系统中具有重要应用。已经探索了各种洛伦兹互易装置来实现非对称传输。然而，对比度是有限的。在这里，我们表明线偏振波和圆偏振波的非对称传输都可以通过结合偏振转换和选择性传输来实现。这里可能最重要的是，所提出的用于在 633 nm 波长下工作的非对称传输装置在实验上显示出非对称传输，其对线性偏振波和圆偏振波的对比度分别超过 37 dB 和 34 dB。高对比度比以前发表的文献中的结果要高得多。