Ultrashort broadband polarization beam splitter based on an asymmetrical directional coupler

被引：185

作者：

Dai, Daoxin ^{[1
,2
]}

Wang, Zhi ^{[1
]}

Bowers, John E. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, ECE Dept, Santa Barbara, CA 93106 USA

[2] Zhejiang Univ, Ctr Opt & Electromagnet Res, Zijingang Hangzhou 310058, Peoples R China

来源：

OPTICS LETTERS | 2011年 / 36卷 / 13期

关键词：

SLOT WAVE-GUIDE; MULTIMODE INTERFERENCE COUPLER; SILICON WIRE; DESIGN; FABRICATION; CRYSTAL; LIGHT;

D O I：

10.1364/OL.36.002590

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An ultrashort polarization beam splitter (PBS) based on an asymmetrical directional coupler is proposed by utilizing the evanescent coupling between a strip-nanowire and a nanoslot waveguide. In order to be convenient for integration with other components, mode converters between the nanoslot waveguide and the strip-nanowire are introduced and merged into S-bends to achieve an ultracompact PBS. As an example a 6.9 mu m long PBS based on a silicon-on-insulator platform is designed, and the length of the coupling region is as small as 1.3 mu m. Numerical simulations show that the present PBS has a very broad band (>160 nm) for an extinction ratio of >10 dB. (C) 2011 Optical Society of America

引用

页码：2590 / 2592

页数：3

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