All-Angle Quasi-Self-Collimation Effect in a Rod-Type Silicon Photonic Crystal

被引：5

作者：

Li, Ming ^{[1
,2
]}

Li, Wei ^{[1
]}

Huang, Haiyang ^{[1
,2
]}

Wang, Jing ^{[1
,2
]}

Li, You ^{[1
,2
]}

Wu, Aimin ^{[1
]}

Sheng, Zhen ^{[1
]}

Wang, Xi ^{[1
]}

Zou, Shichang ^{[1
]}

Gan, Fuwan ^{[1
]}

机构：

[1] Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

IEEE PHOTONICS JOURNAL | 2015年 / 7卷 / 01期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Coupling efficiency; photonic crystals; quasi-self-collimation; antireflection layer;

D O I：

10.1109/JPHOT.2015.2399433

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

By changing the symmetry of a photonic crystal (PC) with a rectangular lattice to straighten one of the isofrequency contours, the PC shows an all-angle quasi-self-collimation (quasi-SC) effect. To investigate the straightness of the isofrequency contour and the quasi-SC effect, we propose a straightness factor L based on the method of least squares. With L <= L-0 (L-0 = 0.01 is the critical value), the isofrequency contour is sufficiently straight to induce the quasi-SC effect with the beam quasi-collimating in the structure. Furthermore, the efficiency of light coupling to the quasi-SC PC is studied and can be greatly improved by applying a carefully designed antireflection structure. This quasi-SC effect of the PC and the coupling structure may see applications in novel optical devices and photonic circuits.

引用

页数：8

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