摘要
分析了多光子晶体谐振腔的并联耦合模理论,并根据该理论设计了单通道光子晶体侧面耦合波导以实现光子晶体器件与光源间的高效耦合。理论研究表明并联谐振腔的耦合效率与谐振腔数量、间距以及品质因子相关。经优化耦合面积和耦合效率,最终选择了5个谐振腔并联作为单通道侧面耦合波导的耦合部分。通过设置谐振腔间距改变其对称性,从而实现侧面耦合波导的单通道传播。在1.55μm工作波长下,单通道侧面耦合波导的耦合效率可达94.49%。
The coupled mode theory of parallel photonic crystal resonators is analyzed,based on which,a side-coupled waveguide to achieve the efficient coupling between photonic crystal devices and the light source is proposed.The theory analysis indicates that the coupling efficiency is sensitive to the total number,the interval and the quality factors of the resonators.By the optimization of the coupling efficiency and the coupling region,five parallel resonators are selected to construct the coupling part of the single channel side-coupled waveguide.Single channel propagation of the side coupled waveguide is realized through changing the interval of the resonators.The single channel side-coupled waveguide achieves the coupling efficiency of 94.49% at the wavelength of 1.55 μm.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2012年第2期287-293,共7页
Acta Optica Sinica
基金
国家自然科学基金(60877031)资助课题
关键词
光学器件
耦合模理论
光子晶体
侧面耦合波导
optical devices
coupled mode theory
photonic crystal
side-coupled waveguide
