Complex modes and instability of full-vectorial beam propagation methods

被引：6
|
作者：
Xie, Huan [1 ]
Lu, Wangtao [2 ,3 ]
Lu, Ya Yan [1 ]
机构：
[1] City Univ Hong Kong, Dept Math, Kowloon, Hong Kong, Peoples R China
[2] Univ Sci & Technol China, Joint Adv Res Ctr, Suzhou, Jiangsu, Peoples R China
[3] City Univ Hong Kong, Suzhou, Jiangsu, Peoples R China
来源：
OPTICS LETTERS | 2011年 / 36卷 / 13期
关键词：
FIELD PROPAGATION; WAVE-GUIDES;
D O I：
10.1364/OL.36.002474
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Full-vectorial beam propagation methods (FVBPMs) are widely used to model light waves propagating in high-index-contrast optical waveguides. We show that the paraxial FVBPM and wide-angle FVBPMs based on diagonal Pade approximants are analytically unstable for waveguides with complex modes. The instability cannot be removed by enlarging the computational domain, increasing the numerical resolution, or using perfectly matched layers, because the complex modes are highly confined around the waveguide core. (C) 2011 Optical Society of America
引用
收藏
页码：2474 / 2476
页数：3
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