Polarization Beam Splitter for Silicon-based Cross-slot Waveguides Using an Asymmetrical Evanescent Coupling System

被引：0
|
作者：
Wu, Shengbao [1 ]
Feng, Ting [1 ]
Wang, Xichen [1 ]
Yao, X. Steve [1 ,2 ]
机构：
[1] Hebei Univ, Coll Phys Sci & Technol, Hebei Key Lab Opt Elect Informat & Mat, Photon Informat Innovat Ctr, Baoding 071002, Peoples R China
[2] Gen Photonics Corp, Chino, CA 91710 USA
来源：
2018 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE (ACP) | 2018年
基金：
中国国家自然科学基金;
关键词：
evanescent coupling; polarization beam splitter; silicon photonics; slot waveguides;
D O I：
暂无
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A compact and broadband polarization beam splitter (PBS) for the silicon-based cross-slot waveguides (CSWs) is proposed by utilizing a cascaded asymmetrical evanescent coupling system composed of two CSWs and a horizontal slot waveguide (HSW) between them. By optimizing the width of the HSW, an asymmetrical directional coupler which can efficiently separate the TE and TM modes is constructed. Numerical results show that a short PBS of similar to 17.4 mu m with an insertion loss of 0.16 (0.37) dB, extinction ratio (ER) of 29.5 (24.2) dB for TM (TE) mode is achieved at 1.55 mu m, and its bandwidth can be enlarged to similar to 90 nm for ER > 18 dB (TE).
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页数：3
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