Nanophotonic Polarization Routers Based on an Intelligent Algorithm
Nanophotonic Polarization Routers Based on an Intelligent Algorithm
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基于智能算法的纳米光子偏振路由器
DOI：
10.1002/adom.201902018
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发表时间：
2020-05-01
影响因子：
9
通讯作者：
Zhang, Xiangdong
中科院分区：
文献类型：
--
作者：
Lu, Cuicui;Liu, Zhouhui;Zhang, Xiangdong
纳米光子偏振路由器是片上集成光子电路的重要组成部分，它可以将具有不同偏振态的横电模式和横磁模式的光分离并引导到不同的输出端口。通过开发一种结合遗传算法和有限元法的智能算法，成功地设计了具有不同工作频段、不同结构、不同材料、易于加工和集成的各种极化路由器。在近红外范围内的片上超小型硅基偏振路由器的实验证明。其尺寸仅为970 nm x 1240 nm，是目前所展示的最小尺寸。在近红外范围内，测量的归一化透射率高达85%。此外，基于智能算法设计的无序光栅结构，还实现了宽带高效光子耦合器。这打破了传统结构的限制，为实现纳米光子偏振路由器提供了通用平台，为纳米光子器件的设计和高密度片上集成铺平了道路。
Nanophotonic polarization routers, which can separate and steer light with different polarizations of transverse electric and transverse magnetic modes into different output ports, are an essential component of on-chip integrated photonic circuits. By developing an intelligent algorithm that combines the genetic algorithm and the finite element method, various polarization routers possessing different operation bands, different structures, and different materials, which can be easily fabricated and integrated, are successfully designed. On-chip ultrasmall silicon-based polarization routers are experimentally demonstrated in the near-infrared range. The footprint is only 970 nm x 1240 nm, which is the smallest demonstrated. The measured normalized transmission is up to 85% in the near infrared range. Additionally, a broadband highly efficient photon coupler is also achieved based on disordered-grating configurations designed by the intelligent algorithm. This breaks the restrictions of traditional structures, provides a universal platform for the realization of nanophotonic polarization routers, and paves a way for the design and high-density on-chip integration of nanophotonic devices.