High-efficiency coupling between external and photonic crystal waveguides by longitudinally shifting waveguide junctions

被引：3
作者：
Chang, CW
Cheng, SC
Hsieh, WF [1 ]
机构：
[1] Natl Chiao Tung Univ, Inst Electroopt Engn, Hsinchu, Taiwan
[2] Chinese Culture Univ, Dept Phys, Taipei, Taiwan
来源：
OPTICS COMMUNICATIONS | 2004年 / 242卷 / 4-6期
关键词：
photonic crystal waveguide; coupling efficiency; optical waveguide; periodic structures; Bragg reflection; integrated optics;
D O I：
10.1016/j.optcom.2004.09.016
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Longitudinally shifting waveguide junctions can achieve high efficiency light coupling from external silica waveguides into photonic crystal waveguides (PCWs) without requiring taper PCW structures in the waveguide junctions. Due to the periodic field distribution of PCWs along the propagation direction, maximum and minimum coupling efficiency occur when waveguide junctions are located near the peak and valley of the longitudinal mode profile, and coupling efficiency depends on both the localization of mode fields in PCWs and the group velocities of eigenmodes. Coupling efficiency of 86% between silicon/silica PCWs and external silica waveguides can be achieved without the need for special design in the junction region for the reduced-rod PCW. Due to large Bragg reflection, coupling of the band edge modes at the flat dispersion regions that possess small group velocities is inefficient. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：517 / 524
页数：8
相关论文
共 18 条
[1]   Design of low-loss tapered waveguides using the telescope structure compensation [J].
Chang, CW ;
Wu, ML ;
Hsieh, WF .
IEEE PHOTONICS TECHNOLOGY LETTERS, 2003, 15 (10) :1378-1380
[2]   Photonic crystal tapers for ultracompact mode conversion [J].
Happ, TD ;
Kamp, M ;
Forchel, A .
OPTICS LETTERS, 2001, 26 (14) :1102-1104
[3]   A dispersion compensator using coupled defects in a photonic crystal [J].
Hosomi, K ;
Katsuyama, T .
IEEE JOURNAL OF QUANTUM ELECTRONICS, 2002, 38 (07) :825-829
[4]   Block-iterative frequency-domain methods for Maxwell's equations in a planewave basis [J].
Johnson, SG ;
Joannopoulos, JD .
OPTICS EXPRESS, 2001, 8 (03) :173-190
[5]   Modal conversion with artificial materials for photonic-crystal waveguides [J].
Lalanne, P ;
Talneau, A .
OPTICS EXPRESS, 2002, 10 (08) :354-359
[6]   Ultrashort 2-D photonic crystal directional couplers [J].
Martinez, A ;
Cuesta, F ;
Marti, J .
IEEE PHOTONICS TECHNOLOGY LETTERS, 2003, 15 (05) :694-696
[7]   Planar photonic crystal structure with inherently single-mode waveguides [J].
Martinez, A ;
Garcia, J ;
Sanchez, G ;
Marti, J .
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 2003, 20 (11) :2131-2136
[8]   Tapered couplers for efficient interfacing between dielectric and photonic crystal waveguides [J].
Mekis, A ;
Joannopoulos, JD .
JOURNAL OF LIGHTWAVE TECHNOLOGY, 2001, 19 (06) :861-865
[9]   Analysis of coupling between two-dimensional photonic crystal waveguide and external waveguide [J].
Miyai, E ;
Okano, M ;
Mochizuki, M ;
Noda, S .
APPLIED PHYSICS LETTERS, 2002, 81 (20) :3729-3731
[10]   Comparison of three-dimensional photonic crystal slab waveguides with two-dimensional photonic crystal waveguides: Efficient butt coupling into these photonic crystal waveguides [J].
Moll, N ;
Bona, GL .
JOURNAL OF APPLIED PHYSICS, 2003, 93 (09) :4986-4991
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