Broadband polarizing beam splitter with metal-wire nanograting in near infrared region

被引：22

作者：

Wu, Jun ^{[1
]}

Zhou, Changhe ^{[1
]}

Cao, Hongchao ^{[1
]}

Hu, Anduo ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Lab Informat Opt & Optoelect Technol, Shanghai 201800, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2013年 / 47卷

基金：

中国国家自然科学基金;

关键词：

Diffraction and gratings; Polarizing beam splitter; RCWA; GRATINGS;

D O I：

10.1016/j.optlastec.2012.09.006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A broadband polarizing beam splitter (PBS) with metal-wire nanograting in near infrared region is designed and analyzed. The grating profiles are optimized by use of rigorous coupled-wave analysis (RCWA) and the simulated annealing (SA) algorithm. Based on the optimized structure, high polarization efficiency, high extinction ratio and large angular tolerance with a broad wavelength range (1-3 mu m) are obtained. Both of the transmission efficiencies of TM-polarization and reflection efficiencies of TE-polarization are over 95%. The extinction ratio of transmittance and reflectance are over 25 dB and 16 dB in the 1-3 mu m wavelength range, respectively. At the same time, as a comparison we also design a PBS with double-groove metal-wire nanograting, the grating has two grooves per period, which is different from conventional gratings. The PBS also has large angular tolerance, which is -40 degrees to 40 degrees. The designed grating can be used in optical communication and infrared imaging polarimetry. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：166 / 170

页数：5

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