Wang Fang, Chen Yake, Ma Tao, Liu Heng, Wang Xu, Jin Chan
Appl Opt. 2021 Mar 10;60(8):2441-2449. doi: 10.1364/AO.418238.
In this paper, a - hybrid plasmonic waveguide (HPW) with an asymmetric metal cladding is designed for the mid-infrared polarization rotator (PR). The mode characteristics and polarization rotation performances of the - HPW-based PR are simulated by using the finite element method. Operating at the wavelength of 3.5 µm, the polarization conversion efficiency between two polarization modes (PM 1 and PM 2) is larger than 99% at a - HPW length of 104 µm. The - HPW-based PR maintains good polarization rotation performances within fabrication tolerances from -10 to 10 nm. The polarization rotator based on the - HPW paves the way to achieve integrated waveplates, driving many important optical functions from free space onto a chip.
本文设计了一种具有非对称金属包层的混合等离子体波导（HPW）用于中红外偏振旋转器（PR）。采用有限元方法模拟了基于该HPW的PR的模式特性和偏振旋转性能。在波长为3.5 µm时，在长度为104 µm的HPW中，两种偏振模式（PM 1和PM 2）之间的偏振转换效率大于99%。基于该HPW的PR在-10至10 nm的制造公差范围内保持良好的偏振旋转性能。基于该HPW的偏振旋转器为实现集成波片铺平了道路，推动了许多重要光学功能从自由空间转移到芯片上。
