Ultrasmall Si-nanowire-based polarization rotator
Ultrasmall Si-nanowire-based polarization rotator
复制标题
超小型硅纳米线偏振旋转器
DOI：
10.1364/josab.25.000747
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发表时间：
2008-05-01
影响因子：
1.9
通讯作者：
Dai, Daoxin
中科院分区：
文献类型：
--
作者：
Wang, Zhechao;Dai, Daoxin
提出了一种基于非对称硅纳米线的极化旋转器，并对其进行了优化，以获得高的极化旋转效率(几乎为100%)。目前的偏振旋转器具有非常小的转换长度(类似于10微米)，因此变得非常紧凑。波长相关性分析表明，目前的偏振旋转器具有较宽的带宽(接近120 nm)，具有较高的转换效率(~gt；97%)。对各种加工误差的容忍度也进行了数值研究。为了补偿制造误差，提出了一种通过改变上包层折射率的后置补偿方法。(C)2008年美国光学学会。
A polarization rotator based on asymmetrical Si nanowires is presented and optimized for high polarization rotation efficiency (almost 100%). The present polarization rotator has a very small conversion length (similar to 10 mu m) and consequently becomes very compact. The analysis of the wavelength dependence shows the present polarization rotator has a broad bandwidth (similar to 120 nm) for high conversion efficiency (> 97%). The tolerance to various fabrication errors is also numerically studied. To compensate the fabrication error, a post-compensation method is introduced by modifying the refractive index of the up-cladding. (c) 2008 Optical Society of America.