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요약정보
漏斗型完全光子带隙光波导单向传输 / Unidirectional transmission of funnel-shaped waveguide with complete bandgap
Resource Type
Academic Journal
Authors
智文强
;
费宏明
;
韩雨辉
;
武敏
;
张明达
;
刘欣
;
曹斌照
;
杨毅彪
;
Zhi Wen-Qiang
;
Fei Hong-Ming
;
Han Yu-Hui
;
Wu Min
;
Zhang Ming-Da
;
Liu Xin
;
Cao Bin-Zhao
;
Yang Yi-Biao
Source
物理学报 / Acta Physica Sinica
. 71(3):315-323
Subject
漏斗型光波导;光子带隙;点缺陷;单向传输;模式转换
Language
Chinese
ISSN
1000-3290
Online Access
Web of Science
Scopus
JCR 저널정보
초록
光波单向传输器件在全光计算和信息处理方面具有重要应用.本文提出一种具有完全光子带隙的硅基空气孔光子晶体漏斗型光波导结构,在光通信波段可实现单向传输特性.漏斗型光波导可打破光波对称传输,引入点缺陷通过模式转换与失配进一步抑制反向透射,并研究了不同的点缺陷类型与位置对反向透射的影响.采用时域有限差分法进行数值计算,优化选取了最佳的点缺陷模式.结果显示,单柱型点缺陷在向左移动5a(a为光子晶体晶格常数,a=470 nm)时,横电(TE)偏振光在工作波长1550 nm处正向透射率为0.716,透射对比度为0.929,工作带宽为111 nm.另外,本文提出的光波单向传输器件结构简单、工艺要求低,有望为集成光路中单向传输器件设计提供新的解决方案.
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