Numerical Study of Transmission Improvement in a Photonic Crystal Waveguide Bend by Mode-Matching Technique

被引：11
|
作者：
Lu, Ming-Feng [1 ,2 ,3 ]
Yang, Yu-Lin
Huang, Yang-Tung
机构：
[1] Minghsin Univ Sci & Technol, Dept Elect Engn, Hsinchu 304, Taiwan
[2] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu 30010, Taiwan
[3] Natl Chiao Tung Univ, Inst Elect, Hsinchu 30010, Taiwan
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2008年 / 20卷 / 21-24期
关键词：
Bound state; cavity mode; mode matching; photonic crystal (PC); transmission; waveguide;
D O I：
10.1109/LPT.2008.2006918
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：
An approach to improve the transmission efficiency of photonic crystal (PC) waveguide bends through maximization of the overlap integral of fields between the straight waveguide and the waveguide bend is presented. By shifting the lattice points around the bend corner, the bound state in the waveguide bend and the guided mode in the straight waveguide are matching, and the transmission of a PC waveguide bend can be significantly improved. The transmission of a 120 degrees PC waveguide bend with mode matching is dramatically improved from 5.7% to 87.5%. The bound state in a PC waveguide bend is similar to a cavity mode; therefore, the PC waveguide bend performs a narrowband transmission. Frequency shift of the spectra for a PC waveguide bend due to this lattice shifting can also be observed.
引用
收藏
页码：2114 / 2116
页数：3
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