Ultracompact and silicon-on-insulator-compatible polarization splitter based on asymmetric plasmonic-dielectric coupling

被引：47
|
作者：
Gao, Linfei [1 ]
Hu, Feifei [1 ]
Wang, Xingjun [1 ]
Tang, Liangxiao [1 ]
Zhou, Zhiping [1 ]
机构：
[1] Peking Univ, Sch Elect Engn & Comp Sci, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2013年 / 113卷 / 02期
关键词：
WAVE-GUIDE; BEAM SPLITTER; SURFACE-PLASMON; CONFINEMENT; COMPACT; SCALE; LIMIT;
D O I：
10.1007/s00340-013-5457-7
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
An ultracompact and silicon-on-insulator-compatible polarization splitter (PS) is proposed by utilizing asymmetric directional coupling between a hybrid plasmonic waveguide and a strip dielectric waveguide. Owing to the plasmon-assisted asymmetry, birefringence is highly enhanced. Polarization splitting can be realized by strong coupling of one polarization while the other polarization is phase-mismatched. As an example, a PS based on strong TM coupling is demonstrated at the wavelength of 1.55 mu m with a coupling length of 4.13 mu m. Extinction ratios are 20.9 and 16.4 dB for TM and TE polarizations, respectively. The device is also broadband and fabrication-tolerant.
引用
收藏
页码：199 / 203
页数：5
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