High-performance transverse magnetic mode-pass polarizer based on silicon nitride-silicon subwavelength grating waveguide for mid-infrared wavelengths

被引：7

作者：

Chi, Jiao ^{[1
,3
]}

Liu, Hongjun ^{[1
,2
]}

Huang, Nan ^{[1
]}

Wang, Zhaolu ^{[1
]}

机构：

[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China

[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100084, Peoples R China

来源：

APPLIED PHYSICS EXPRESS | 2018年 / 11卷 / 04期

基金：

中国国家自然科学基金;

关键词：

BEAM SPLITTER; COMPACT; ULTRACOMPACT; ROTATOR;

D O I：

10.7567/APEX.11.042005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A high-performance transverse-magnetic (TM) mode-pass polarizer for mid-infrared wavelengths based on a silicon nitride-silicon subwavelength grating (SWG) waveguide is proposed. The designed device supports the Bloch mode for the TM mode only, whereas the transverse-electric mode is reflected by the SWG. Simulations show that with a device length of 7 mu m, this polarizer is capable of achieving an ultrahigh polarization extinction ratio PER) of similar to 50 dB and an insertion loss of similar to 0.3 dB at a wavelength of 2 mu m. The device bandwidth is increased to 60nm for PER > 30 dB. The polarizer also shows good tolerance to fabrication uncertainties. (c) 2018 The Japan Society of Applied Physics

引用

页数：5

共 21 条

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